16
HE-12/HE-4
Instruction Manual
MSBC - Sub-Band Block Converter
Description
The MSBC is a modular sub band block up-converter designed for use in Blonder Tongue’s HE Series rack chassis’. The unit
provides sub-band capability to MIDM-806C demodulators by block converting sub-band channels T7 to T13 to receivable
VHF channels 7 to13. The MIDM-806C A/V outputs can then be connected to a modulator such as a MICM-45C, AMCM
860 or AMM Series for a complete modular headend processing solution.
RF
Input Frequency Range: 5.75-47.75 MHz
(Channels T7-T13)
Output Frequency Range: 174-216 MHz
(Channels 7-13)
Recommended Input Level Range: 0 to +20 dbmV
Conversion Gain: 3 db
Flatness: 1.5 db P/V
LO Frequency accuracy @ 25 deg. C: +/- 500 Hz
Intermod Distortion: -60 dbc
(In band Ch. 7-13 @ 0 to + 20 dbmV input)
Input/Output Impedance: 75 Ohm
Return Loss: Input: 15 db/ Output: 17 db
Electrical
+12 VDC, 100 mA
1.2 Watts
Mechanical
Dimensions: 1.15 x 3.5 x 7.5 in.
Weight: 13.5 oz.
Temperature Range: 0 to 50 degrees C
Connectors (Rear)
Sub-band Input: “F” Type Female
RF Output: “F” Type Female
Power: 3 Pin Header
Indicators (Front)
Power Green LED
Specifications (Typical)
SUB-BAND
INPUT
NOT
USED
RF
OUTPUT
POWER
VIDEO
IN
AUDIO
IN
RF
OUT
POWER
VIDEO
OUT
RF IN
POWER
Return
Channel(s)
From
Sub-Band
Diplexer
Ch.T7-T13
MSBC
MIDM
MICM
AMCM
AMM
Forward
Output
Channel to
Combiner
é
Sub-Band
Converter
Demodulator
Modulator
AUDIO OUT
MSBC
POWER
INDICATOR
BLONDER
TONGUE
65
Front Panel
T7
7 MHz
168.25 MHz
7
175.25 MHz
T8
13 MHz
168.25 MHz
8
181.25 MHz
T9
19 MHz
168.25 MHz
9
187.25 MHz
T10
25 MHz
168.25 MHz
10
193.25 MHz
T11
31 MHz
168.25 MHz
11
199.25 MHz
T12
36 MHz
168.25 MHz
12
205.25 MHz
T13
43 MHz
168.25 MHz
13
211.25 MHz
Channel
Frequency
Channel
Frequency
INPUT
LO FREQ.
OUTPUT
