Charles 7305-14 4W-2W, Manual

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Section 730-514-202
13
7. Set switches on S8 as follows: 1, 2, 4 and –1 to IN; and 4’ and –.5 to OUT.
Note: When no equalization is required or a flat frequency response of the receive amplifier is desired, place
all switches on S8 to OUT.
Figure 9. 7305-14 And 7305-19 Option Locations
Table 4. 7305-14 And 7305-19 Option Description
Switch Designation Switch Function Switch Position
S1, S2 150 Ohm line impedance
600 Ohm line impedance
1200 Ohm line impedance
150
600
1200
S3, S4, S5, and S6 E & N trunk/signaling, type I/III E & M non-looped, type II E&M
looped, and 2W/4W station See Table 3
S7 2W port build-out-network (BON):
To balance 100 to 250 feet of 26 gauge cable
To balance less than 100 feet of cable
IN
OUT
S8 Cable equalization, loaded and/or nonloaded. Provides up to 11 dB
of receive equalization (1000 to 2800 Hz) in 1dB steps using
switches 1, 2, 4, and 4’ and up to –1.5 dB of receive equalization
(1000 to 400 Hz) in –0.5 dB steps using switches –.5 and –1 See Table 5
Front Panel RCV GN RCV path gain adjustment of up to +24 dB in 0.1 dB steps See Table 4
Front Panel XMT GN XMT path gain adjustment of up to +24 dB in 0.1 dB steps See Table 4
Front Panel RCV ATN RCV path attenuation adjustment of up to +24 dB in 0.1 dB steps See Table 4
Front Panel XMT ATN XMT path attenuation adjustment of up to +24 dB in 0.1 dB steps See Table 4