ps 155 interface to simplex ('push to talk')
Contents
1. PS 155 2 CHANNEL INTERCOM NETWORK WITH WIRELESS INTERFACE PGM PS 19 PS 278 AUX A 5 19 5 19 PS 19A PS 155 CHANNEL B HAS ACCESS TO THE WIRELESS USERS 2 CHANNEL INTERCOM NETWORK WITH WIRELESS INTERFACE PGM PAGE 11 User manual PS 155 Issue 2011 ASL Intercom BV 15 0 BLOCK DIAGRAM PS 155 Test Tone Generator Receive Level Sidetone High Sidetone Low Sidetone Level Output Gain ee A wi TX Control Send Level VOX Attack amp Release Call Buzzer Detect Mute Circuit Circuit ASL Intercom BV PS 155 Block Diagram PAGE 12 User manual PS 155 Issue 2011 ASL Intercom BV2. To access the internal trimmers the PS 155 needs to be opened Before doing so disconnect the unit of all other equipment Open the PS 155 by removing the two screws of the cover at either side Then connect the PS 155 to the intercom party line and to the wireless unit OUTPUT GAIN trimmer R4 CALL DETECT trimmer R29 With this trimmer the output gain can be adjusted With this trimmer the CALL detect level can be The trimmer is located on the PCB board at the adjusted Proceed as follows left near to the transformers e Set the TX CONTROL select switch at the To increase the gain turn clockwise front panel in the position CALL To decrease the gain turn counter clockwise e Connect a user station to the intercom party line VOX DETECT trimmer 9 e Press and hold a CALL button on that user With this trimmer the attack time of the VOX station switch can be adjusted Proceed as follows e Turn trimmer R29 If the trimmer is turned e Set the TX CONTROL select switch to too much counter clockwise the internal position VOX Transmit Switch is triggered every second e Connect a user station to the intercom this is also shown by the Rx Tx LED If party line and connect a headset to that the trimmer is turned too much clockwise station the internal Transmit Switch has a very e Speak into the headset microphone long release time when the CALL button of e First adjust the LEVEL and RELEASE the connected station is released Try to trimm
3. PTT Push To Talk Transmit mode is enabled by pushing an external button to be connected to the PS 155 This push button should be momentary only See also section 8 0 PAGE 5 User manual PS 155 Issue 2011 ASL Intercom BV 8 0 THE CABLE TO THE WIRELESS UNIT This section describes the connection between the PS 155 and the wireless unit and the connection between the PS 155 and an external PTT switch At the wireless unit the connection cable is plugged into the connector which is normally used to connect a speaker microphone device At the PS 155 the cable is plugged into Sub D9 connector at the rear panel Pin assignment of the Sub D9 connector Pin 1 Audio input Pin 2 Audio input Pin 3 PTT button switch Pin 4 Transmit switch Common Pin 5 Transmit switch Normally Open Pin 6 Transmit switch Normally Closed Pin 7 Ground shield Pin 8 Audio output Pin 9 Audio output Pin 1 and 2 The Audio Input is transformer balanced decoupled with capacitors to obtain a high DC resistance If the wireless unit uses asymmetric signal transport then the audio input pin 1 is to be connected to the ground of the wireless unit and if necessary to pin 7 of the Sub D 9 connector Pin 8 and 9 The Audio Output is transformer balanced decoupled with capacitors to obtain a high DC resistance If the wireless unit uses asymmetric signal transport then the output pin 9 is to be connected to the g
4. The PS 155 is designed to be a single channel audio interface between simplex push to talk wireless intercom systems and ASL wired party line intercom systems The unit is housed in a strong steel tabletop case Located on the front panel are volume controls send and receive side tone adjustment trimmers a test tone switch VOX adjustment trimmers and TX controls The PS 155 contains an audio interface which splits the audio on the wired intercom party line into an audio output and an audio input Via the audio output the audio of the party line is sent to the wireless intercom system Via the audio input the audio of the wireless system is sent to the party line Audio output and audio input can be separately volume controlled by a SEND respectively a RECEIVE volume knob Both the output and the input are transformer balanced The built in test tone generator assists obtaining the best possible side tone rejection in the audio interface section The tone generator is activated by pushing the recessed switch at the front panel To connect the PS 155 to a wireless intercom system a special cable is needed In this user manual it is assumed that the cable is connected to a simplex push to talk wireless intercom station Motorola Kenwood or other make hereinafter called the wireless unit If the internal Transmit Switch of the PS 155 is triggered the wireless unit goes from receive mode to transmit mo
5. ANALOG INTERCOM PS 155 INTERFACE TO SIMPLEX PUSH TO TALK WIRELESS INTERCOM AUDIO LEVEL SIDETONE TX CONTROL Low High Level Test f Level Release Pe A Power Rx Tx Receive CALE al USER MANUAL Issue 2011 ASL Intercom BV DESIGNED AND MANUFACTURED BY ASL INTERCOM BV ZONNEBAAN 42 3542 EG UTRECHT THE NETHERLANDS PHONE 31 0 30 2411901 FAX 31 0 30 2667373 E MAIL info asl inter com WEB www asl inter com CONTENT OF THIS USER MANUAL 10 GENERAL DESCRIPTION leeren 3 20 UNPACKING arri 9 9 0 3 50 FRONT PANEL 5 4 6 0 REAR PANEL CONNECTORS S 7 0 RECEIVE AND TRANSMIT MODE 5 80 THE CABLE TO THE WIRELESS UNIT 6 90 SIDE TONE ADJUSTMENT PROCEDURE PARTY LINE 8 10 0 VOX ADJUSTMENT PROCEDURE 8 11 0 INTERNAL CONTROLS 0 0 2 eee eee ee eee 9 12 0 TECHNICAL SPECIFICATIONS 9 13 0 PROBLEM SOLVING seen how vp ey sete S Rae 10 14 0 POSSIBLE SYSTEM CONFIGURATIONS 11 15 0 BLOCK DIAGRAM PS 155 12 PAGE 2 User manual PS 155 Issue 2011 ASL Intercom BV 1 0 GENERAL DESCRIPTION
6. OX circuitry detects an audio signal on the intercom party line that is louder than the level set by this trimmer the wireless unit goes from receive mode to transmit mode See section 10 0 for the VOX adjustment procedure SIDETONE PS 155 TX CONTROL wireless interface ASL am PTT b Power Rx Tx CALL Test Level Release tone gt i 11 8 VOX RELEASE trimmer After the audio signal of the intercom party line falls below the set VOX level the wireless unit stays in transmit mode for a period of time that is preset by this trimmer See section 10 0 for the VOX adjustment procedure 9 TX CONTROL select switch This switch has the positions VOX CALL and PTT each indicating the way the wireless unit is triggered to go from receive mode to transmit mode See section 7 0 10 POWER LED This LED is lit when the PS 155 is powered by the Intercom line 11 Rx Tx LED This LED is lit green when the wireless unit is in receive mode and lit red when the wireless unit is in transmit mode See also section 7 0 PAGE 4 User manual PS 155 Issue 2011 ASL Intercom BV 6 0 REAR PANEL CONNECTORS 5 155 wireless interface Serialnumber 12 LINE connectors These male and female XLR 3 connectors are for connecting the PS 155 to the intercom party line Pin assignments Pin 1 OV ground shield Pin 2 30 V power wire Pin 3 audio wire 7 0 RECEIVE AND TRANSMIT MODE If the internal T
7. acturer is to be preferred Make sure that the connections made to the wireless unit are according to the specifications of its manufacturer Always use the by ASL supplied Sub D9 connector cable part this connector is shielded To avoid RF interference place the wireless unit not to close to the PS 155 and the intercom cables But the connection cable should not be too long User manual PS 155 Issue 2011 ASL Intercom BV Tip 3 5mm jack audio Output sleeve 3 5mm jack gnd audio output Tip 2 5mm jack audio input Sleeve 2 5mm jack gnd audio input Example of connecting the Kenwood UBZLF68 Mini Jack 2 5 mm Pin 1 SubD 9 of the PS 155 Pin 2 SubD 9 of the PS 155 Pin 3 SubD 9 of the PS 155 Pin 4 SubD 9 of the PS 155 Pin 5 SubD 9 of the PS 155 Pin 6 SubD 9 of the PS 155 Pin 7 SubD 9 of the PS 155 Pin 8 SubD 9 of the PS 155 zi Push To Talk switch Pin 9 SubD 9 of the PS 155 lel Mini Jack 3 5 mm Example of connecting the Kenwood UBZ LH68 Mini Jack 2 5 mm Pin 1 SubD 9 of the PS 155 Pin 2 SubD 9 of the PS 155 Pin 3 SubD 9 of the PS 155 Pin 4 SubD 9 of the PS 155 Pin 5 SubD 9 of the PS 155 Pin 6 SubD 9 of the PS 155 Push To Talk switch Pin 7 SubD 9 of the PS 155 Pin 8 SubD 9 of the PS 155 Pin 9 SubD 9 of the PS 155 a 330R lel Mini Jack 3 5 mm E
8. de There are 3 ways to trigger the Transmit Switch to be selected by a 3 position switch in the TX CONTROL section of the PS 155 front panel See section 7 0 2 0 UNPACKING The shipping carton contains the parts listed below e the PS 155 e this user manual e a Sub D 9 connector cable part If any are missing contact your dealer ASL has taken great care to ensure this product reaches you in flawless condition 3 0 WARRANTY This unit is warranted by ASL Intercom to the original end user purchaser against defects in workmanship and materials in its manufacture for a period of one year from date of shipment to the end user 4 0 INSTALLATION This PS 155 is powered 30V DC by an ASL master station or separate power supply via the intercom connection cable the party line Connect this cable to the LINE connector on the rear panel Use professional microphone cable with 2 wires and 1 shield only After unpacking the unit please inspect for any physical damage to the unit and retain the shipping carton and relevant packing materials for use should the unit need returning If any damage has occurred please notify your dealer immediately so that a written claim can be initiated Please also refer to the warranty section of this manual Faults arising from misuse unauthorized modifications or accidents are not covered by this warranty If the unit is faulty it should be sent in its original packing to the sup
9. en to one of the wireless units not the one which has the connection cable Adjust the 3 side tone trimmers so that at the wireless unit the test tone listen level is set to a minimum First the LEVEL trimmer and then the HIGH and the LOW trimmer If needed the SEND volume of the PS 155 can be turned up while adjusting the trimmers Repeat the adjustment of the trimmers over and over until you are sure that you have obtained the minimum listen level 10 0 VOX ADJUSTMENT PROCEDURE Before starting this procedure make sure that the party line side tone has been properly adjusted see section 9 0 To adjust the VOX proceed as follows Put the TX CONTROL select switch to VOX Turn the LEVEL and RELEASE trimmers counter clockwise Connect an intercom user station to the party line connect a headset to that station and speak into the microphone of headset With the LEVEL trimmer adjust the audio level on the party line to which the PS 155 should trigger the wireless unit to go from receive mode to send mode the Rx Tx LED changes from green to red With the RELEASE trimmer adjust the release time of the VOX switch The attack time of the VOX switch can be adjusted by internal trimmer R9 see section 11 0 User manual PS 155 Issue 2011 ASL Intercom BV 11 0 INTERNAL CONTROLS OO t 6
10. ers at the front panel find a suitable position for the trimmer in e Then adjust the attack time with trimmer between those two points R9 12 0 TECHNICAL SPECIFICATIONS Side Tone party line Dimensions amp Weight Rejection 0 35 dB adjustable Width 90 mm Height 38 mm Depth 124 mm Weight 260 grams PAGE 9 User manual PS 155 Issue 2011 ASL Intercom BV 13 0 PROBLEM SOLVING PROBLEM CAUSE CHECK PS 155 does not respond No power supply or defective Wired intercom power supply and party cable of the wired intercom line cable No audio of the wireless Receive volume is too low Receive volume knob system to the party line Cable not properly connected Cable to the wireless unit PS 155 not properly connected Cable to the wired intercom No audio from the party Send volume too low Send volume knob line to the wireless system Volume on wireless unit too low Volume knob of the wireless unit Cable to wireless unit not properly Cable to the wireless unit connected PS 155 not properly connected Cable to the wired intercom Wireless unit does not TX Control not in the position PTT Change the TX Control switch to PTT respond to the external PTT switch Connection of the external switch Connection of the external PTT switch not properly done Connection between wireless unit The cable and the details of both units and PS 155 incorrect Units do not respond to TX Control switch not in the Put the TX Co
11. ntrol switch in the VOX position VOX position VOX VOX level too low Turn the VOX level trimmer clockwise Audio level on the wired intercom Increase the audio level on the wired line too low intercom by speaking louder and closer into the microphone In VOX mode the units VOX level too sensitive Turn the VOX trimmer counter stays in transmit mode clockwise Bad side tone rejection Re adjust the side tone trimmers again Level of the wireless unit is too Turn the volume control of the wireless high unit down In VOX mode the signal is VOX level not sensitive enough Turn the VOX LEVEL trimmer clockwise briefly interrupted Release time too short Turn the VOX RELEASE trimmer clockwise After reception of audio Bad side tone rejection Re adjust the side tone trimmers again from the wireless unit the PS 155 switches to Input signal is too high Turn down the Receive level transmit briefly Input signal is too high Turn down the volume of the wireless unit The audio on the party line Send and or Receive volume too Turn down one or both levels changes when the PS 155 high changes transmit and receive mode Improperly connected cable Check cables and connections interference distortion Bad sidetone rejection Re adjust the side tone trimmers again PAGE 10 User manual PS 155 Issue 2011 ASL Intercom BV 14 0 POSSIBLE SYSTEM CONFIGURATIONS PS 19 PS 278 fe AUX PS 19 PS 29 PS 19A
12. plier or your local ASL dealer with shipping prepaid A note must be included stating the faults found and a copy of the original suppliers invoice The PS 155 is fully protected against wiring mistakes reverse power or short circuit in the intercom connecting cable To connect the PS 155 to the wireless unit a special cable is needed to be connected to the oub D9 connector on the rear panel For the pin configuration of this connector and further details see section 8 0 PAGE 3 User manual PS 155 Issue 2011 ASL Intercom BV 5 0 FRONT PANEL CONTROLS AUDIO LEVEL High Reckive 2 OOD 8 1 RECEIVE volume knob This knob is for adjusting the level of the audio that is received from the wireless unit 2 SEND volume knob This knob is for adjusting the level of the audio that is sent to the wireless unit 3 SIDE TONE LOW trimmer 4 SIDE TONE HIGH trimmer 5 SIDE TONE LEVEL trimmer Trimmers 3 4 and 5 are for adjusting the rejection of the side tone the LEVEL trimmer for the whole audio spectrum the HIGH trimmer for fine tuning the high frequencies and the LOW trimmer for fine tuning the low frequencies See section 9 0 6 TEST TONE button By pushing this recessed button the built in test tone generator is activated The test tone assists in obtaining the best possible side tone rejection see section 9 0 7 VOX LEVEL trimmer This trimmer adjusts the detection level of the VOX switch As soon as the V
13. ransmit Switch of the PS 155 is triggered the wireless unit connected to the PS 155 see section 8 0 goes from receive mode to transmit mode The Rx Tx LED 11 goes from being lit green to being lit red The Transmit Switch can be triggered in three different ways to be selected by a 3 position switch in the TX CONTROL section of the PS 155 front panel These switch positions are CALL Transmit mode is enabled by pushing any CALL button at the wired intercom stations Detect of this Call signal triggers the Transmit Switch When this option is selected the buzzers of all user stations connected to the party line are automatically disabled The Call Detect level can be adjusted by internal trimmer R29 see section 11 0 transceiver A 13 TO TRANSCEIVER connector This Sub D 9 pole connector is for connecting the PS 155 to the wireless unit The connector is also used to connect an external PTT switch to the PS 155 For pin assignment and further details see section 8 0 VOX Transmit mode is enabled by detecting audio on the intercom party line As soon as this audio signal exceeds an adjustable threshold the Transmit Switch is triggered The VOX has a special frequency contouring circuit which is optimized for the human voice The attack threshold level and the release time can be adjusted at the front panel The attack time can be adjusted by internal trimmer R9 see section 11 0
14. round of the wireless unit and if necessary to pin 7 of the Sub D9 connector The gain of the Audio Output can be adjusted by internal trimmer R4 see section 11 0 Pin 3 and 7 An external PTT Push To Talk button may be connected to these pins of the Sub D9 connector By pushing the PTT button the wireless unit is triggered to go from receive mode to transmit mode De PTT button only works if the TX CONTROL select switch 9 is set in position PTE Pins 4 5 and 6 The Transmit Switch contacts are located between these pins of the sub D9 connector Normally Open Most wireless units need a contact to be closed to go from receive mode to transmit mode Use pin 4 and 5 Some wireless units need to see a special DC resistance Ask the manufacturer of the wireless intercom system to advise you on what value of the resistor to use Usually the resistor is to be mounted in the Common wire of the Transmit Switch contacts See also drawings below Normally Closed some wireless units need a contact to be opened to go from receive to transmit mode Use pin 4 and 6 Important notices PAGE 6 Use high quality cables and connectors Make sure that all interconnecting cables are properly shielded This to avoid RF interference of the wireless intercom system and the wired ASL intercom system If possible use a balanced audio connection to and from the wireless unit Using a cable assembly from the wireless intercom manuf
15. xample of connecting the Motorola GP 300 Pin 1 SubD 9 of the PS 155 Pin 2 SubD 9 of the PS 155 Motorola connector 3 5mm jack 2 9mm jack E Pin 8 SubD 9 of the PS 155 Pin 9 SubD 9 of the PS 155 Pin 4 SubD 9 of the PS 155 Pin 5 SubD 9 of the PS 155 Resistor 4700 ohms PAGE 7 Pin 3 SubD 9 of the PS 155 Pin 7 5000 9 of the PS 155 User manual PS 155 Issue 2011 ASL Intercom BV 9 0 Example of connecting the Motorola HT 800 HT 800 pin 2 audio output HT 800 pin 8 gnd audio output HT 800 pin 1 audio input HT 800 pin 5 gnd audio input HT 800 pin 7 OPT SEL WE HT 800 pin 4 PTT Motorola connector View on Motorola 1 2 3 13 10 4 5 6 11 12 7 8 9 Pin 1 SubD 9 of the PS 155 Pin 2 SubD 9 of the PS 155 Pin 8 SubD 9 of the PS 155 9 Pin 9 SubD 9 of the PS 155 e Pin 3 SubD 9 of the PS 155 Pin 5 SubD 9 of the PS 155 Pin 4 SubD 9 of the PS 155 Pin 7 SubD 9 of the PS 155 SIDE TONE ADJUSTMENT PROCEDURE PARTY LINE To adjust the side tone proceed as follows Connect the PS 155 to the wireless unit If the wireless unit has a volume control turn it down to approx 10 a volume that is too high may cause problems such as distortion Connect the PS 155 to the party line of the wired ASL intercom system Put the SEND and RECEIVE volumes of the PS 155 in the 12 o clock position Push the Test Tone button with a pen or pencil List
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