A. Activate RDL. This may be done in two ways: First, by moving
the front panel toggle switch UP to "Remote". Second, by raising pin 21
on the RS-232 interface (Note: Make sure DIP switch S3-6 is ON; and
DIP switch S2-6 is OFF).
B. Perform a BER (bit error rate) test on the system.
C. If the BER test equipment indicates a fault, and the Local Analog
Loopback test was successful for both Model 1080A Series units, you
may have a problem with the twisted pair line between the modems.
You should then test the twisted pair line for proper connections and
continuity.
5.4.3 Using the V.52 BER Test Independently
The V.52 BER test can be used independently of the V.54 loopback
tests. This requires two operators: one to initiate and monitor the test
at the local 1080A/1080A-64, and one at the remote 1080A/1080A-64.
To use the V.52 BER test by itself, both operators should
simultaneously follow these steps:
1. Locate the “511/511E” toggle switch on the front panel of the unit
and move it UP. This activates the V.52 BER test mode and
transmits a “511” test pattern to the other unit. If any errors are
present, the receiving modem's red “ERROR” LED will blink
sporadically. Note: For this test to function, the “511” switch on
both 1080A Series units must be on.
2. If the test indicates no errors are present, move the V.52 toggle
switch DOWN, activating the “511/E” test with periodic errors
present. If the test is working properly, the receiving modem’s red
“ERROR” LED will blink
regularly. A successful “511/E” test will
confirm that the link is in place, and that the Model 1080A Series’
built-in “511” generator and detector are working properly.
5.5 POWER-DOWN
Turn off the Model 1080A Series by simply unplugging the AC
power adapter from the wall. There is no power switch.
23 24
APPENDIX A
PATTON MODEL 1080A SERIESSPECIFICATIONS
Transmission Format: Synchronous or asynchronous, 2-
wire/half duplex, or 4-wire/full or half
duplex
Interface: RS-232 (CCITT V.24) connection via
DB-25 female; twisted pair connection
via RJ-45 or terminal block
Transmission Line: 2 or 4-wire UTP, 19 - 24 AWG
Data Rates: Model 1080A - Synchronous or
asynchronous at 1.2, 1.8, 2.4, 3.6, 4.8,
7.2, 9.6, 14.4, 19.2, 28.8, 38.4, and 57.6
kbps—switch selectable;
Model 1080A-64 - Synchronous or
asynchronous at 16, 32, and 64
kbps—switch selectable
Clocking: Internal, external or receive recover
Controls: Carrier constantly “ON” or “controlled by
RTS”; RTS/CTS delay set to no delay, 7
or 53 ms
Applications: Point-to-point or multi-point
Indicators: Bi-color LED indicators for TD, RD, RTS
&DCD; single LED indicators for Test
and Error
RTS Anti-stream Timer 12.5 sec., 50 sec., or disabled (switch
selectable); tolerance: +50%, -0
Diagnostics: V.52 compliant bit error rate pattern
(511/511E pattern) generator and
detector with error injection mode;
V.54 compliant—Local Analog Loopback
and Remote Digital Loopback, activated
by front panel switch or via RS-232
interface
Transformer Isolation: 1500 V RMS
Surge Protection: Immune to IEC-801-5 Level 2, 1kV
Temperature: 0-50°C / 32-122°F
Humidity: 0-95%, non-condensing
Dimensions: 6.2”w x 4.2”h x 1.5”l
Power Supply (US): Wall-mount; input: 120 VAC; output:
10-12 V AC