M805-00
Functional Tests
8.5
Copyright TEL
30/09/96
8.2.2
Test Mode 1
8.2.2.1
Introduction
Remove any shorts from LINK 1.
Set the DIP switches (SW301 & SW302) as shown in Table 8.1 (note that only
switches D0, D1 and D2 define the test mode).
SW301
SW302
-- Not relevant to card setting.
Note:
Depending on the type of switch used:
if a switch is pushed down in the position labelled "OFF", it is at logic 1;
or
if the switch is pushed towards the LED indicators on the ASP card to the
"OFF" position, the bit value is a logic 1.
Table 8.1 DIP switch settings for placing the ASP card in test
mode 1.
Apply power to the ASP card and short LINK 1 after the ASP card has success-
fully powered up.
The "TEST MODE", "TSGM", "LEM" and "ARM" LEDs should light up (unless oth-
erwise indicated). The operation of the "WDR" LED is random in this test mode
and should be ignored.
8.2.2.2
Analogue Audio Circuitry
In this test the electronic relays are in their normal energised state, allowing audio to be
passed. A signal is fed into the main input of each audio interface circuit (AIC), digi-
tised and passed into the digital signal processor IC (DSP). It is then passed back into
the original AIC, reconverted into an analogue signal and passed into the AIC’s main
output. The signal path is thus:
the signal from the summing of inputs 3 and 4 is passed to the balanced output of
IC202 (O/P-1), and the input 2 signal is passed to the balanced output of IC204
(O/P-2).
1
0
1
--
--
--
--
--
D0
D1
D2
D3
D4
D5
D6
D7
--
--
--
--
--
--
--
--
D8
D9
D10
D11
D12
D13
D14
D15
Summary of Contents for T805
Page 16: ...4 2 ASP Card Operation M805 00 30 04 95 Copyright TEL ...
Page 44: ...7 18 Initial Programming Adjustment M805 00 30 09 96 Copyright TEL ...
Page 70: ...14 1 2 PCB Information M805 00 30 04 95 Copyright TEL ...
Page 89: ...Copyright TEL 30 09 96 M805 00 T805 Front Panel PCB Information 14 5 3 ...