![background image](http://html1.mh-extra.com/html/zetron/1708/1708_installation-and-operation-manual_3547303048.webp)
Setup and Installation
025-9209K
48
CAUTION
Remove the jumpers when finished testing. Do not to leave the radios
transmitting continuously as this can harm some radios.
MODEL 1708 JUMPERS AND I/O
The jumper and I/O connector information in this subsection applies to the Model 1708 (Part
No. 901-9260). For similar information applying to the 1716, see page 50.
Model 1708 Jumper Settings
Jumper
Name/Signal
Description
JP1
Carrier Detect
A = 47k
Ω
pull down to ground
B = 47k
Ω
pull-up to +12 V
dc
JP2
Serial Port Power
Co12 V
dc
(fused) to J2 Pin 6 of RS-232
Connector (DB9)
JP3
Push-To-Talk
A = PTT completes the connection between P3 Pin 3
and Pin 4.
B = PTT provides a ground indication on P3 Pin 3.
JP4
Push-To-Talk
IN = Push to Talk provides a +5 V
dc
pull up on release.
OUT = Push to Talk goes to open upon release.
JP5
Test A
1800 Hz Test Tone — See Table 20 for instructions
JP6
Test B
1200 Hz Test Tone — See Table 20 for instructions
JP7
Receive Audio Gain
A = Low 1x gain on Receive Audio
B = High 10x gain on Receive Audio
JP8
External Audio
A = External Audio Source Input
B = No External Audio
JP9
Transmit Audio
A = 50
Ω
impedance
B = 600
Ω
impedance
JP10
Carrier Detect Adjust
A = Adjustable Carrier Detect threshold, 0 to 10 V
dc
B = 0-0.7 V
dc
Logic low, 3.5-5.0 V
dc
Logic high
JP11
Analog Input #1
Adds 249
Ω
load resistor
JP12
Analog Input #2
Adds 249
Ω
load resistor
JP13
Analog Input #3
Adds 249
Ω
load resistor
JP14
Analog Input #4
Adds 249
Ω
load resistor
JP19
+5 V
dc
Output
IN = +5 V
dc
enabled on J1 pin 16
OUT = +5 V
dc
disconnected on J1 pin 16
Model 1708 I/O Connections
Содержание 1708
Страница 1: ...Models 1708 and 1716 Remote Terminal Units Installation and Operation Manual 025 9209K...
Страница 8: ...Contents 025 9209K 8...
Страница 56: ...025 9209K 56...
Страница 60: ...Repair 025 9209K 60 MODEL 1700 SERIES ENCLOSURE OUTLINE 024 0057B...
Страница 61: ...Repair 025 9209K 61 MODEL 1700 SERIES ENCLOSURE INSTRUCTIONS 024 0056D Sheet 1 of 2...
Страница 62: ...Repair 025 9209K 62 024 0056D Sheet 2 of 2...
Страница 63: ...Repair 025 9209K 63 MODEL 1708 REMOTE TERMINAL UNIT SILKSCREEN 702 9439F...
Страница 64: ...Repair 025 9209K 64 MODEL 1716 REMOTE TERMINAL UNIT SILKSCREEN 702 9440F...
Страница 72: ...Appendix B 025 9209K 72...
Страница 80: ...Glossary 025 9209K 80...