Telex 1505 - Manual
Telex 1505 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – Table of Contents
- Page 5 – terminating resistor is provided for; . 3 . 5 P a r a l l e l T r a n s m i t L i n e I m p e d a n c e
- Page 8 – NOTE
- Page 14 – REF; Ckt; RES VAR 1.0K LOG CERMET
- Page 15 – Sym
1505 Audio Line Driver
Service Manual
098-0355
CH 1
CH 1
Tx
Rx
MIC
SPEAKER
CH 2
CH 2
CH 3
CH 3
CH 4
CH 4
LEVEL ADJUST
CH 1
CH 1
CH 1
MUTE
Tx
Rx
HANDSET
MIC
SPEAKER
CH 2
CH 2
CH 2
CH 3
CH 3
CH 3
CH 4
CH 4
CH 4
SPKR
PTT
1505 MIXER/
LINE DRIVER
LEVEL ADJUST
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Summary
1. General The Vega Model 1505 Audio Line Driver is ageneral purpose card that provides a reliablemeans of remotely controlling a variety of cus-tomer specified devices. The card is flexible. Itcan perform basic switching functions, custom-ized switching functions (via jumpers), or spe-cial user-def...
4.3.2 Microphone Jumpers Depending on which microphone you are us-ing, the following jumpers must be installed: JP2 - carbon element; JP3 - electret element; JP4 - dynamic element with a low output. No jumpers are installed for a dynamic micro- phone with a high output. 4.3.3 Receive Line Input Impe...
6. Theory of Operation 6.1 General The 1505 module uses a low loss, wide band transformer for each channel to interface to the phone line. Gain elements are low noise, low distortion, high gain operational amplifiers for quality performance. Each channel utilizes one half of dual compandor IC, confi...
