ADA-26S STEREO AUDIO DISTRIBUTION AMPLIFIER
ADA-26S
Doc. No. – 14480
Page 3 of 4
FRONT PANEL:
The adjustments and indicators on the front panel (Figure 3) can be accessed through the slots provided
in the ADA-26S frame. Factory settings of the module provide unity gain, maximum common mode rejection,
and a bandwidth of 100 kHz.
Gain Control
- Gain control for the right channel is achieved by adjustments to S01and R012. Gain
control for the left channel is achieved by adjustments to S901and R912. S01 and S901 provide gain
adjustment in increments of 6dB, while R012 and R912 provide fine adjustments of +/- 3dB. The positions of
S01 and S901 make the following adjustments to the gain level of the circuit - = OFF, 1= -6dB, 2= 0dB, 3=
+6dB, 4= +12dB, 5= +18dBand 6= +24dB.
Mode Selection –
To select the three (3) output stereo mode, set the mode select switch, S02, to the left
position. This will activate the Left gain controls and Left Input on the rear panel. To select the single input,
six (6) output mode, set the mode select switch, S02, to the right position. This will deactivate the Left gain
controls and input on the rear panel.
Figure 3: Front Panel Gain Adjustment
ADJUSTMENTS:
The ADA-26S has no adjustments other than the front panel gain control and mode selection.
SPECIFICATIONS:
INPUT: ...............................................Dual channel, Balanced, +24 dBm Maximum
INPUT IMPEDANCE: ........................30 k
Ω
Balanced, DC coupled
OUTPUT: ...........................................+24 dBm Maximum
OUTPUT
IMPEDANCE:
....................100
Ω
Balanced, DC coupled
LEFT/RIGHT SEPARATION: ............All outputs driven into 600
Ω
, unused input terminated.
............................................................Greater than 80 dB, 20 Hz to 20 KHz
HUM and NOISE: ..............................less than -80 dBm at Unity Gain, 22Hz to 22Khz filter
less than -65 dBm at +27 dB Gain, 22Hz to 22Khz filter
THD+N:
.............................................Into
600
Ω
, 22Hz to 22Khz filter, 0dBm to +24 dBm
less than 0.05% 20 Hz to 20KHz)
IND (SMPTE 4:1 60Hz/7KhZ): ..........same conditions as THD+N, less than 0.02%
GAIN RANGE: ...................................(-6) to +24 dB in 6dB steps,±3dB vernier when terminated into 600
Ω
.
GAIN VARIATION: ............................±0.3 dB
CMR: .................................................Greater than 70 dB at 60 Hz, 60 dB at 20 KHz
0dBm to +24dBm
RESPONSE: ......................................Into 600
Ω
, ±0.2 dB, 20 Hz to30 KHz
S01
R012
S901
R912
S02
3
1
2
4
5
6
3
1
2
4
5
6
