TB 9-6625-2296-35
Select Dist In
(d) DATA ENTRY 1 ......................
SINAD/BER
(e) DATA ENTRY 2 ......................
Upper Lmt On
(f) DATA ENTRY 4 ......................
Set Upper Lmt
(g) DATA ENTRY 5 ......................
20.0%
(h) DATA ENTRY 2 0 ENTER ....
Average On
(i) DATA ENTRY 9 ......................
FIELD SELECT ⇓ .................
Highlight 10. Filter Select
(j)
Low Pass Filter Freq
(k) DATA ENTRY ENTER ..........
Low Pass Filter 15.000 kHz
(l) DATA ENTRY 1 5 K ...............
Return
(m) Ret (F5) ....................................
(4) Set audio analyzer for 50 Ω (SPCL 75) output impedance, source frequency to
1 kHz, source level to 1 V, press SOURCE FLOAT key to illuminate, and record
multimeter indication. Set audio analyzer source level to minimum
(5) Set calibrator frequency to 2400 Hz and amplitude for multimeter indication
recorded in (4) above. Press calibrator NEW REF key.
(6) Set audio analyzer source level to 1 V and press calibrator 10 key one time. If
TI distortion meter does not indicate between 9.4 and 10.6 percent, perform b below.
(7) Set calibrator frequency to 3010 Hz and press calibrator 10 key one time. TI
distortion meter will indicate between .4 and 1.6 percent.
(8) Set calibrator frequency to 6030 Hz and press calibrator X10 key twice. Use
calibrator amplitude output adjustment controls to set calibrator control display Error to
+82.42%. TI distortion meter will indicate between 15.7 and 19.9 percent.
b. Adjustments
(1) Press key sequence listed in (a) through (d) below:
Distortion Meter Menu
(a) SETUP .....................................
Auxiliary Functions Menu
(b) AUX (F6) ..................................
(c) DATA ENTRY 1 ......................
Distortion Meter
(d) DATA ENTRY 5 ......................
(2) Press DATA ENTRY ENTER key to highlight Proper Reading field. Enter
10 using DATA ENTRY keys and press DATA ENTRY ENTER key. Press Ret (F5) key.
(3) Press MODE MTRS (Meter Menu) key; when prompted for backup data, press
SHIFT and Y keys (Backup Cal Data ? y/n).
a. Performance Check
(1) Connect equipment as shown in figure 3. Set audio analyzer source level to
minimum, multimeter to measure volts ac, and press calibrator WIDEBAND key on.