Auxiliary Input - Viking PA-250 Product Manual
250 watt / 70v telecom paging amplifier
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Also See for PA-250:
- Product manual (6 pages) ,
- Quick start manual (2 pages) ,
- Quick start manual (2 pages)
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C. Auxiliary Input
Step 1
Connect any line level source to the AUX IN terminals (pins 9 & 10)
Adjust the front panel AUX trim pot so the AUX LED flashes with Aux audio. If AUX audio sounds
distorted, its input is probably being overdriven. Turn down the front panel AUX trim pot until the sound
Step 2
is clear. The VOX Silence Time Out feature will end the page after 3 seconds of silence, but is
programmable from 1 - 9 seconds.
If the auxiliary audio is coming from an RCA jack, and hum or buzz is present in the audio, the RCA cable
Step 3
shield may need to be grounded on the PA-250 side. This can be done by connecting the cable shield
to the SHIELD terminal (pin 11).
NOTE: A speaker level signal can be connected to the AUX IN terminals, as long as the front panel AUX trim pot is turned down low
enough to not overdrive the input.
PA-250 Back Panel
MICROPHONE
FXO (LOOP START)
FXS (RING TRIP)
PAGE PORT
1
2
3
4
PROG
+
D. 600 Ohm Output for Additional Paging Power
When more than a 250 Watt load is required, a Viking model PP-250 can be added to achieve a 500 Watt load capability.
Connect the PA-250's 600 OHM OUTPUT terminals (pins 12 & 13), to the PP-250's LINE INPUT
Step 1
terminals (pins 1 & 2).
Step 2
If a shield cable is used, connect the cable's shield at both ends.
Step 3
Adjust the PP-250's front panel INPUT trim pot so the LED flashes with page audio.
5
6
7
8
9
10
11
12
13
+
+
+
Any Line Level Source
MICROPHONE
FXO (LOOP START)
FXS (RING TRIP)
PAGE PORT
1
2
3
4
PROG
+
PP-250 Back Panel
MICROPHONE
VIKING
MODEL PP-250
FXO (LOOP START)
FXS (RING TRIP)
250 WATT PAGING POWER AMPLIFIER
PAGE PORT
1
2
3
4
PROG
+
Model CTG-2A shown
See Product Manual: DOD 464.
See Product Manual: DOD 464.
PA-250 Back Panel
5
6
7
8
9
10
11
12
13
+
+
+
LINE INPUT
1
2
3
5
6
7
8
9
10
11
12
13
14
+
+
+
+
+
Model PP-250 shown (not included)
See Product Manual: DOD 511.
5
(not included)
Also available:
Model MTG-10
Product Manual: DOD 482
Model CTG-1A
Product Manual: DOD 461
Model DNA-510
Product Manual: DOD 492
LOUD
RING
70V
14
15
16
17
18
19
20
21
22
+
SPEAKERS
LOUD
70V
RING
70V
4
5
6
7
15
16
17
18
19
20
21
22
+
+
+
SPEAKERS
SPEAKERS
SPEAKERS
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