9
ADJUSTMENTS
All adjustments are made with respect to barrier strip TB2, terminals 11 and 12.
CUE TONE LEVEL:
A screwdriver adjustment in the center of the rear panel is provided for adjustment of the Cue
Tone level into the program audio. Maximum audio level is obtained by turning this control fully
clockwise.
The Cue Tone level on the program audio should be adjusted for
– 12 dBm (200 MV RMS). The
Model 3171B (A4 position) has an on board level adjustment R10. By placing the rear panel level
adjustment in its center position the model 3171B R10 can be adjusted counterclockwise to
decrease the Cue Tone level to the desired level.
CUE TONE DELAY:
The delay time between a switch closure and the beginning of a Cue Tone transmission may also
be adjusted. The Model 3223B-2 (A5 position channel 1 and 2) and or (A2 position channel 3 and
4) has an on board adjustment R12. Turning R12 clockwise will lengthen delay time between a
switch closure and the beginning of a Cue Tone transmission, this factory set at a one second
delay.
CUE TONE TRANSMISSION RATE:
The Cue Tone transmission rate may be adjusted for other that the factory setting of 10 Hz (50 ms
first pulse width). The Model 3223B-2 (A5 position channel 1 and 2) and/or (A2 position channel 3
and 4) has an on board adjustment R11. Turning R11 clockwise will increase the transmission
rate; 12.5 Hz. Equals 40 ms first pulse width; 14.3 Hz. Equals 35 ms first pulse width.
R11
located on
3223B-2 pcb
