RFL Electronics 9780 - Controls and Indicators; Table 11-1. Controls and Indicators, RFL 9780 RF Interface Module

RFL 9780 RFL Electronics Inc.
May 19, 2000 11-3 (973) 334-3100
11.4 CONTROLS AND INDICATORS
Figure 11-4 shows the location of all controls and indicators on the RF Interface module. These
controls and indicators are described in Table 11-1. Potentiometer R13, and test points TP8, TP9 and
TP10 are accessible with the module installed in the chassis. All other controls and indicators are
accessible only when the module is removed from the chassis or is on a card extender.
Table 11-1. Controls and indicators, RFL 9780 RF Interface Module
Component
Designator
Name/
Description
Function
J1 Jumper Calibration/Run select. Calibration position is for factory use only.
J2 Jumper Allows input attenuation from 0 dB to 50 dB in 10 dB steps.
J3 Jumper High or low gain select. High = gain of 40, Low = gain of 4.
R13 Potentiometer Signal gain adjust. Accessible from front edge of module.
R16 Potentiometer Phase adjust for high frequency section. For factory use only.
R20 Potentiometer Frequency adjust for high frequency section. For factory use only.
R46 Potentiometer Phase adjust for low frequency section. For factory use only.
R49 Potentiometer Frequency adjust for low frequency section. For factory use only.
SW1 DIP Switch Center frequency (Fc) select. See Table 11-2.
SW2 DIP Switch Center frequency (Fc) select. See Table 11-2.
SW3 DIP Switch Center frequency (Fc) select. See Table 11-2.
SW4 DIP Switch Center frequency (Fc) select. See Table 11-2.
TP1 Test point Common signal test point.
TP2 Test point Output of first gain stage.
TP3 Test point Output of second gain stage.
TP4 Test point Band pass output of first state variable filter section. Used for factory calibration.
TP5 Test point Inverted band pass output of first state variable filter section. Used for factory
calibration.
TP6 Test point Low pass output of first state variable filter section. Used for factory calibration.
TP7 Test point Band pass output of second state variable filter section. Used for factory calibration.
TP8 Test point Signal common test point on front edge of module.
TP9 Test point Output of second gain stage. Accessible from front edge of module.
TP10 Test point Final output of module.
TP11 Test point Low pass output of second state variable filter section. Used for factory calibration.
TP12 Test point Inverted band pass output of second state variable filter section. Used for factory
calibration.