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Asymod BT-HPSA V2, Instruction Manual

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Asymod BT-HPSA V2 Instruction Manual Download Page 11

- 11 - 

 

 
 

 

In a high RF field, audio cable shields should be connected to a solid earth 
ground at both ends to achieve best shielding against RFI. 

 

6.

 

Connect to Transceiver 

 

Connect the DEMOD, SPK, TX IN and TX OUT (color to color except blue to yellow) RCA 
connectors from the transceiver. 
 
Connect the TRANSCEIVER 9 pin connector.

 

 

 

 
 

7.

 

Connect to Audio Process Chain 

 

Connect one end of a ¼” TS balanced connector to the LINE IN connector and the other 
end to the output of the audio process chain. 

 

8.

 

Connect the Recording Device 

 

Connect an RCA jumper cable from the REC jack to the audio input of the recording 
device. 
 
 
 

Summary of Contents for BT-HPSA V2

Page 1: ......

Page 2: ...se and power cord 10 Set the HPSA V2 in Place 10 Power Ground 10 Earth Ground 10 Connect to Transceiver 11 Connect to Audio Process Chain 11 Connect the Recording Device 11 Connect the Headphones 12 Connect the Playback Device 12 Connect the PTT push to talk 12 Connect AMP KEY 12 Connect the AC Line Cord 12 Section Operation 8 Set Up the Audio Process Chain 13 Set Up the Transceiver 13 Set up The ...

Page 3: ...set on board or can be user defined via the audio process chain Processing your audio is necessary to make up for the limitations of the average receiver because such processing can make audible many defects ordinarily lost in the AM noise it is very important that the source audio be as clean as possible Making the Most of your Hi Fi Station The HPSA V2 is suitable for HF operation an all high an...

Page 4: ...e performance of an AM station is highly dependent upon the high power RF sections of the transmitter and upon the behavior of the antenna system The high average power and the pre emphasized high frequency component of processed audio puts great demands upon the performance of the transmitter and antenna system While improved results can be expected from most configuration and settings of a less ...

Page 5: ...stortion is the single best measure of audio processing effectiveness Compression reduces the difference in level between the soft and loud sounds to make more efficient use of permitted peak level limits resulting in a subjective increase in the loudness of soft sounds It cannot make loud sounds seem louder Compression reduces dynamic range relatively slowly in a manner similar to riding the gain...

Page 6: ...udio signal for recording and monitoring via headphones The TX MON switch allows to select between TX line level audio LINE or TX demodulated audio DEMOD The audio from the LINE is a sample of the audio from the audio chain while the audio from the DEMOD is audio sampled from the TX RF stage of the transceiver via an AM detector demodulator NOTE The output of the AM detector demodulator typically ...

Page 7: ... connector provides keying for an amplifier and is rated at 10A 250VAC 10A 30VDC The DEMOD input accepts signals up to 4 VPP from an Am demodulator Detector RF sampler The SPK input accepts speaker level signals and connects to the transceiver speaker output The TX IN input accepts line level inputs from the transceiver s microphone audio and control stage The TX OUT output provides line level aud...

Page 8: ...SA V2 Front Panel POWER switch POWER ON indicator GAIN line in control MODULATION control CARRIER control ASYMMETRY control REC MIX control TX MON switch REC LEV control PHONES control PHONES jack AM mode indicator SSB PK indicator TX indicator ...

Page 9: ...ack AMP KEY jack REC jack TX IN jack DEMOD jack SPK jack TX OUT jack LINE IN jack TRANSCEIVER connector AC power connector Mains switch Fuse Holder PIN ASSINGMENT 1 GND 2 PTT 3 8V AM 4 GND 5 GND 6 GND 7 N C 8 High level modulation 9 High level modulation ...

Page 10: ...s possible 4 Power Ground Make sure the HPSA V2 chassis is well grounded through the third wire in the power cord Proper grounding techniques never leave equipment chassis unconnected to power earth ground A proper power ground is essential for safe operation 5 Earth Ground Connect the GND ground terminal to a solid earth ground by a wide copper strap wire which is ineffective at RF frequencies be...

Page 11: ...X OUT color to color except blue to yellow RCA connectors from the transceiver Connect the TRANSCEIVER 9 pin connector 7 Connect to Audio Process Chain Connect one end of a TS balanced connector to the LINE IN connector and the other end to the output of the audio process chain 8 Connect the Recording Device Connect an RCA jumper cable from the REC jack to the audio input of the recording device ...

Page 12: ...o the audio output of the recording device playback device 11 Connect the PTT push to talk Connect a foot or mouse switch wired to an RCA connector to the PTT jack 12 Connect AMP KEY Connect one side of an RCA jumper cable to the AMP KEY jack center tip and the other to the RF amplifier s TX key jack 13 Connect the AC Line Cord Connect the AC line cord to the AC connector ...

Page 13: ...on the Asymod HPSA V2 Switch the Mains switch on the rear panel to the ON position and turn the POWER switch on the front panel to the ON position Set mode to AM the AM indicator should come on solid Turn the TALKBACK off and tune to the desired frequency Connect the dummy speaker 1 8 TS connector to the EXTERNAL SPEAKER jack Set the volume to 12 o clock Connect the RF output of the radio to a goo...

Page 14: ...tive peaks approach 99 and the positive peaks reach 100 At this point you should see the peak indicator come on At this point the transmission is set for 100 modulation and the modulation envelope s vertical deflection will be covering FOUR vertical divisions at the peaks TWO divisions above the 0 volt line and TWO divisions below the 0 volt line at the peaks To raise the modulation percentage bey...

Page 15: ...t be removed Initially set the REC MIX control to 12 o clock Set the TX MON to the LINE setting Speak into the microphone do not key up the transceiver at this time and adjust the REC MIX control to where both the received audio signals and your voice are at the same level Observe the input level of the recording device while slowly raising the REC LEV control continue to raise the REC LEV not to ...

Page 16: ...ur process chain to avoid over modulating the SSB signal If the transceiver has been set up for eSSB your rolloff should take place at approximately 5 kHz otherwise 2 5 kHz On the Stryker SR 955HPC SSB TX audio input level can be adjusted in the transceiver at the location shown below FM operation Switch mode to FM The SSB PK indicator should come on solid Connect the hand microphone to the transc...

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