4
3. TUNER
Either a PLL or a VST tuner is used as a tuner.
UV1316 (VHF/UHF) is used as a PLL tuner. For only PALM/N, NTSC M applications UV 1336 is used as the PLL tuner. UV 1315 (VHF/
UHF) is used as a VST Tuner.
Channel coverage of UV1316:
OFF-AIR CHANNELS CABLE CHANNELS
BAND
CHANNELS
FREQUENCY
CHANNELS
FREQUENCY
RANGE (MHz)
RANGE (MHz)
Low Band
E2 to C
48.25 to 82.25
(1)
S01 to S08
69.25 to 154.25
Mid Band
E5 to E12
175.25 to 224.25
S09 to S38
161.25 to 439.25
High Band
E21 to E69
471.25 to 855.25
(2)
S39 to S41
447.25 to 463.25
(1).
Enough margin is available to tune down to 45.25 MHz.
(2).
Enough margin is available to tune up to 863.25 MHz.
Noise
Typical
Max.
Gain
Min.
Typical
Max.
Low band : 5dB
9dB
All channels
: 38dB
44dB
52dB
Mid band : 5dB
9dB
Gain Taper (of-air channels) : -
-
8dB
High band : 6dB
9dB
Channel Coverage UV1336:
BAND
CHANNELS
FREQUENCY
RANGE (MHz)
Low Band
2 to D
55.25 to 139.25
Mid Band
E to PP
145.25 to 391.25
High Band
QQ to 69
397.25 to 801.25
Noise
is typically 6dB for all channels.
Gain
is minimum 38dB and maximum 50dB for all channels.
Channel Coverage of UV1315:
OFF-AIR CHANNELS
CABLE CHANNELS
BAND
CHANNELS
FREQUENCY
CHANNELS
FREQUENCY
RANGE (MHz)
RANGE (MHz)
Low Band
E2 to C
48.25 to 82.25
(1)
S01 to S10
69.25 to 168.25
Mid Band
E5 to E12
175.25 to 224.25
S11 to S39
231.25 to 447.25
High Band
E21 to E69
471.25 to 855.25
(2)
S40 to S41
455.25 to 463.25
(1).
Enough margin is available to tune down to 45.25 MHz.
(2).
Enough margin is available to tune up to 863.25 MHz.
Noise
Typ.
Max.
Gain
Min.
Typ.
Max.
Low band : 6dB
9dB
All Channels
38dB
44dB
50dB
Mid band : 6dB
10dB
Gain Taper
-
-
8dB
High band : 6dB
11dB
(off-air channels)
4.VIDEO SWITCH TEA6415C
In case of three or more external sources are used, the video switch IC TEA6415C is used. The main function of this device is to switch
8 video input sources on the 6 outputs.
Each output can be switched on only one of each input. On each input an alignment of the lowest level of the signal is made (bottom
of sync. top for CVBS or black level for RGB signals).
Each nominal gain between any input and output is 6.5dB.For D2MAC or Chroma signal the alignment is switched off by forcing, with
an external resistor bridge, 5VDC on the input. Each input can be used as a normal input or as a MAC or Chroma input (with external
resistor bridge). All the switching possibilities are changed through the BUS.
Driving 75ohm load needs an external resistor.
It is possible to have the same input connected to several outputs.
