E.F. Johnson Company VR-CM50 Manuel de service télécharger pdf (Page 47)

CENTRAL PROCESSOR PACKAGE EQUIPMENT

2-23

February 1996

Part No. 004-3039-273

The repeater dropout time is programmable from 1 to

4 seconds. This option requires that the base station

receiver be equipped with a COR output.

2.20.10 TDM-OP335 4-SITE SELECTION RE-

LAYS

TDM-OP335 is a hardware option which equips

the channel with four (4) alternate line selection relays

and assigns the necessary I/O pairs to the connector

wire list. Site selection control can be accomplished

either of two ways:

1. Requires one M3604G or M4604G T/R module at

each console position. The top keys on the channel

module are used to step from site to site. The right

key increments from S1 >> S4 -- the left key decre-

ments from S4 << S1. This method offers the

advantage of requiring only a single module width

of tray space but is less user friendly if sites are fre-

quently switched. This method cannot be used if

the channel has other control options that requires

keys to be designated for site selection.

2. Requires one M3601G or M4601G T/R module

plus one M2904Y Auxiliary Switch module for site

selection. The site keys are programmed as a 1-of-4

interlocked group. This method is more user

friendly since each site is clearly identified but

requires two module widths of tray space and has

the added cost burden of the switch module. This

method is compatible with all other channel control

options.

2.20.11 TDM-OP336 8-SITE SELECTION CON-

TROL

TDM-OP336 is a hardware option which equips

the system with 8-site selection control. This requires:

1/2 TDM-AUX card with relays for each T8 base sta-

tion, and TDM-M3601G or TDM-M4601G T/R mod-

ule plus TDM-M2908Y module with option TDM-

OP604B at each position.

2.20.12 TDM-OP338 MULTIPLE SOURCE

CROSS MUTE

TDM-OP338 is a hardware option which must be

specified for any channel that must be cross muted by

two or more transmit sources. This option can be used

with T1-R1, T2-R2, T4-R4, T2-2R and T4-4R chan-

nels and Receive-only channels. Individual frequen-

cies may be specified as the mute source from T2 and

T4 channels. This option is not required for single-

point cross muting.

2.20.13 TDM-OP340 "HOT STANDBY " LIC

CARD

Unless otherwise specified, a single Line Inter-

face Controller (LIC) is provided for each channel in

the system. TDM-OP340 is a hardware option which

provides an additional controller which operates in a

"hot standby" mode. Should a failure of the primary

control card be detected, the "hot standby" controller

will be automatically brought on-line and the "failed"

controller will be isolated from the system.

NOTE: If the channel is equipped with a tone LOBL

applique (OP305), a DC keying applique (OP311) or

a full conferencing patch applique (OP319), these

options must be specified and priced separately for

both the main and standby LIC card.

If the channel is T2-2R, T4-4R or T8-8R and uses a

QRC for a receive audio path, OP341 must also be

specified to assure proper failure protection.

2.20.14 TDM-OP341 "HOT STANDBY " QRC

CARD

TDM-OP341 is a hardware option which pro-

vides an additional Quad Receiver Controller (QRC)

which operates in a "hot standby" mode. Should a

failure of the primary control card be detected, the

"hot standby" controller will be automatically brought

on-line and the "failed" controller will be isolated

from the system. The option includes the standby

QRC card and backplane interconnect cable. While

OP341 can be used to back-up any QRC in the system,

its primary intended use is to back-up QRC cards

which are part of multi-receiver T/R channels

equipped with option OP340.

2.20.15 TDM-OP345 4-CODE CTCSS SELEC-

TION

TDM-OP345 is a software option which config-

ures a particular channel to generate control functions

to select any of four (4) CTCSS tone codes. The con-

trol functions switch the CTCSS generator at the base

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E.F. Johnson Company VR-CM50 Manuel de service Page 47

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