Section 365–262–205
8
Table 2.
Continuation of Notes for Figure 4 and Figure 5
#
Note
12.
PC mount test jacks
Marking
Access
T&R Line, J1–A
Towards channel unit
T&R DROP, J1–B
Towards office equipment
T1&R1 Line, J2–A
Towards channel unit
T1&R1 Drop, J2–B
Towards office equipment
E&M Line, J3–A
Towards channel unit
E&M Drop, J3–B
Towards office equipment
13.
The XMT INPUT range at T&R: –22.5dBm to +10dBm. The unit is factory adjusted for –16dBm input with the XMT GAIN set to 26dB.
14.
The XMT PRESCRIPTION circuit provides 32.5dB gain in 0.1dB steps to compensate for input level variations. Refer to the following:
INPUT (DBM)
+10
+7
0
–16
–22.5
XMT GAIN (DB)
0
3
10
26
32.5
For normal mode (E&M) the XMT level is –16dBm nominal.
For tandem mode (PLR) the XMT level is +7dBm nominal.
15.
The RCV OUTPUT range at T1&R1: –22.5dBm to +10dBm. The unit is factory adjusted for +7dBm output with the RCV GAIN set to
29.5dB.
16.
The RCV PRESCRIPTION circuit provides 32.5dB gain in 0.1dB steps to compensate for output level variations. Refer to the following:
OUTPUT (DBM)
+10
+7
0
–16
–22.5
XMT GAIN (DB)
32.5
29.5
22.5
6.5
0
For normal mode (E&M) the RCV level is +7dBm nominal.
For tandem mode (PLR) the RCV level is –16dBm nominal.
17.
Busy switch:
Switch handle down is NORM (normal) position.
Switch handle up is BUSY (busy) position.
Busy switch performs the following functions:
Disconnect M-lead (E-lead in tandem mode) from the office equipment.
Turn on BUSY LED on front edge of units.
Applies a busy condition on the E-lead (M-lead for tandem mode) to the office equipment.
Send a busy condition to the far end. This function can be disabled by connecting option M to M3.
Provide a manual busy indication to the alarm and logic units.
18a.
For 3652–62: M-lead conditions:
Mode
M-Lead Conditions
Switch Setting
Normal
Busy: Battery
Idle: Open or Ground
S2 NORM
S3 NORM
Tandem (PLR)
Busy: Battery
Idle: Open (ZC&FC open)
Ground (ZC&FC closed)
S2 Rev
S3 Tandem
Connect Z to Z1 (EB resistance battery)
The MB-lead (Pin 43) provides resistance battery which may be returned to the M-lead through an office contact for a Type II interface.
18b.
For 3652–68: M-lead conditions:
Mode
M-Lead Conditions
Switch Setting
Normal
Busy: Battery
Idle: Open or Ground
S2 NORM
S3 NORM
Tandem (PLR)
Busy: Battery
Idle: Open (ZC open)
Ground (ZC closed)
S2 Rev
S3 Tandem
Connect Z to Z1 (EB resistance battery)
The MB-lead (Pin 43) provides resistance battery which may be returned to the M-lead through an office contact for a Type II interface.
19.
Connect option M to M2 when using the busy switch to send a busy condition to the far end in the norm mode. Connect option M to M1
when sending a busy condition in the tandem mode. This function is disabled by putting M to M3. M3 is selected when performing signal-
ing tests on a looped channel bank or when performing single channel maintenance routines on an operating system.
