Standard Communications mt930b, Service Manual

Page: 11 / 155

M
M
T
T
9
9
3
3
0
0
B
B
S
S
e
e
r
r
v
v
i
i
c
c
e
e
M
M
a
a
n
n
u
u
a
a
l
l
P
P
a
a
g
g
e
e
2
2
-
-
1
1
CHAPTER 2
MT930B SPECIFICATIONS
GENERAL
Primary Power 115 / 230 (+ 6% - 10%)VAC
Line Frequency 50-60-Hz
Power Consumption
≤
72 W
Operating Temperature Range 14 to 104°F (-10 to + 40°C)
Operating Altitude Range 0 to 20,000 feet (0 to 6,100 meters)
Operating Humidity Range (Non-condensing) 0 to 95%
Dimensions (H x W x D) 1.73 x 18.97 x 18.93 inches
(44 x 482 x 481 millimeters)
RF CHARACTERISTICS
RF Input Tuning Range* 950 to 2150 MHz
Tuning Step Size* 1.0 MHz
Fine Tuning Range* ± 2.0 MHz
AFC Range ± 2.0 MHz
Input Level (per Channel, Loaded with 24
Channels) - 20 to – 65 dBm
Input Impedance 75 ohms
Input Return Loss
≥
9 dB
Input Isolation
Between Input 1 to 2, 3, and 4
Between Input 2 to 1, 3, and 4
Between Input 3 to 1, 2, and 4
Between Input 4 to 1, 2, and 3
≥
40 dB
Gain Variation
≤
8 dB
Image Rejection (1
st
IF)
≥
30 dBc
IM3 (-25 dBm Input)
≥
50 dBc
Noise Figure
≤
15 dB
Local Oscillator Leakage at RF Inputs 1, 2, 3, and 4
0.9 to 2.2 GHz and 3.7 to 4.2 GHz
≤
- 55 dBm
All other Frequencies
≤
- 45 dBm
AGC Output (into 10 k
Ω
Load)
0 – 4.8 V dc
LNB Power Voltage High 550 mA
≥
18.0
≤
20.0 V
Low 300 mA
≥
12.7
≤
14.0 V
LNB Power Maximum Current
≥
500 mA
* C-Band standard 24-channel format with 20 MHz channel step. (Continued)