c) Preamplifiers will be detected automatically and the 12V DC voltage will be providing on proper input.
d) UHF3 input is universal input. To this input is possible to connect:
- TV band IV and V antenna, or
- TV band III, IV and V antenna (VHF input will be disconnected, UHF3 input becomes wideband
input VHF+UHF – see Table 1), or
- additional devices (video camera with A/V modulator, satellite receiver, etc.)
- Possible combination of TV bands and VHF and UHF3 inputs come from S3 switch position are
showed in Table 1.
Table 1
TV bands connected to inputs
S4 switch position VHF input UHF3 input
←VHF UHF
→—VHF + UHF
←, →- S4 switch in left or right
2. S1, S2 and S3 switches, assign the required number of channel paths P1…P6 to both of the UHF inputs.
Possible combination of inputs and channel paths are showed in Table2.
Table 2
S1, S2 and S3 switches positions Channel paths connected to the UHF inputs
S1 S2 S3 UHF1 input UHF2 input
↑↓↓P1...P3 P4...P6
↑↓↑P1...P3 P6
↓↑↓P1...P4 P5...P6
↓↑↑P1...P4 P6
↓↓↓P1...P6—
↓↓↑P1...P5P
6
↑↑↓P1...P3P
5...P6
↑↑↑P1...P3P
6
↑, ↓- S1, S2 and S3 switches in up and down positions
3. Not used inputs and outputs should be terminated with 75 Ωresistors in F connectors.
III. UHF channel paths setting
Every channel path possesses two regulators:
- the „21...69” regulator – multi-rotary, enables to tune the filter to the correct channel, and
- the „” regulator – the one-rotary, for the gain adjustment.
1. The regulators „21...69” set in the right final position.
2. The regulators „”set in middle position.
3. Connect mains plug to the power outlet.
4. Connect the level meter to the amplifiers output. If it is necessary use a right attenuator.
5. Select the right channel number on the level meter.
6. Select the regulator „21...69” respondent the chosen channel number and turning its in left, get the
maximum value on the level meter.
7. Using the gain regulator „”, set the required signal level.
8. Repeat steps from point 2 to 4 until all UHF channels are assigned to channel paths.
