JPS PTG-10, Installation And Operation Manual, Page: 11 / 26

PTG-10 Operations Manual
Interoperability Now!
2.7 Configuring the PTG-10
This section explains how to set and adjust all internal jumpers and potentiometers.
2.7.1 Jumper Settings
There are two tone frequencies available depending on the setting of SW1. Placing the switch in
position (0) will produce a 2175 Hz tone; position (1) will produce a 1950 Hz tone.
2.7.2 Potentiometer Adjustments
The PTG-10 has two factory set potentiometers. See Figure 2-1. “Overall Adjust” (R8) is set so
that a -10 dBm input will produce a 0 dBm output. “Pilot Adjust” (R4) is also set for 0 dBm
output. These settings are made with a 600 ohm load across output pins JP1-4 and JP1-5. Both
potentiometers can be re-adjusted to fit specific applications. The SNV-12 voter will work best
with the pilot tone at the same level as the overall audio. The SNV-12 will completely notch out
the pilot tone so that the tone will never be heard at the console or re-transmitted. Also, the high
relative pilot tone level ensures that the voter will easily detect it even when there is a large
amount of high-frequency roll-off in the line from the receiver to the voter.
When adjusting the overall receiver audio level, make sure that one of the COR inputs is
activated. If not, the pilot tone will be mixed with the receiver audio during the adjustment. The
simplest method is to ground pin 3 of JP1 (/COR) to remove the pilot tone. Note that the overall
level adjust (R8), controls the levels of both the receiver audio and pilot tone. As set at the
factory, the pilot tone is at the same level as the receiver audio level. If only R8 is readjusted,
the pilot tone will maintain the same relative level. If audio levels different from the factory
settings are required, always set the overall level first with R8, then adjust the relative pilot tone
level with R4.