ZETFR.
Met dit DOS-programma (zetfr.exe) kan de frequentie van de tuner zoals beschreven in De Kunstmaan April 1997 worden ingesteld. Voor help type:
zetfr -h
Download zetfr.exe (23k381)
Download zetfr.c (bronfile) (23k381)
Nieuwe zetfr met wat meer mogelijheden. Alle speciale bytes zijn evt. te specificeren: adres, control bytes, testbytes.
Download executable: zetfr_2.exe (30k)
Download bronfile: zetfr_2.c (9k)
EPROM-inhoud voor de nieuwe tuner-afstemming
(zie Kunstmaan nr. 3, Augustus 1998)
Voor tuner met XTAL=3.2 MHz:
Download zetf50.bin (binair)
Download zetf50.hex (intel hex)
Voor tuner met XTAL=4.0 MHz:
Download zetf625.bin (binair)
Download zetf625.hex (intel hex)
Schema ZETF. (Ontwerp: H. v. Deursen)
N.b.: Automatische initialisatie nadat voeding is aangesloten (C3) werkt niet altijd goed:
- Slome flank op reset (MR) kan oscillator vrijgeven terwil enkele ff's nog gereset worden en andere niet.
- Er zijn mogelijk wat extra bytes nodig in de EPROM om er zeker van te zijn dat de tuner de informatie goed interpreteert. Dit lijkt nl. problemen te geven bij mijn ZETF.
Tijdelijke oplossing: Schakel even naar andere frequentie en dan weer terug,
nadat de spanning is aangesloten.
Schema decoder
ZETFR.
With this DOS-program the frequency of the receiver as described in De Kunstmaan April 1997(Ducth) can be adjusted. To get help type:
zetfr -h
Download executable only: zetfr.exe (30k)
Download source only: zetfr.c (9k)
New zetfr with a bit more possibilities: (just if you have problems with the other one)
Download executable only: zetfr_2.exe (30k)
Download source only: zetfr_2.c (9k)
Another method to set the frequency is with a piece of hardware generating the appropiate code. The I2C-code is programmed in a EPROM. See schematic below.
Next part will be replaced.
EPROM-content for the receiver-tuner UV816.
For receiver with XTAL=3.2 MHz:
Download zetf50.bin (binair)
Download zetf50.hex (intel hex)
For receiver with XTAL=4.0 MHz:
Download zetf625.bin (binair)
Download zetf625.hex (intel hex)
Using other tuners in the HPR137 receiver. (Arne v. Belle)
The UV816 tuner is not produced anymore, but Philips produces compatible tuners.
Look for old TV sets from Philips and you will often find one of the tuners stated below. These type markings are printed in dot matrix style on top (opposite the connection-pins)
The UV916E/IEC is used as replacement for the UV816 and can be ordered in most Philips repair centers.
Barend Hendriksen now sells the UV916S, almost the same as the UV916E/IEC/ but with different I2C address.
| Tuner
| UV816
UV916E/IEC
| FQ816MEa
FQ916MEa
| UV916S
| UV1216b
UV1316b
|
| I2C programming Address
| 194
| 194
| 192
| 192
|
| Ctrl-byte
| 142
| 142
| 142
| 140 (50KHz step)
|
| Lowband select
| 96
| 224
| 96
| 160
|
| ZETF Frequency control (62.5 Khz Stepsize)
| zetf6.hex
| zetf6.hex
| zetf916s.hex
| zetf916s.hex
| not available yet
|
| Pin 1-2 on ZETF
| close
| open
| don't care
| -
|
- Note: Pin 1-2 is a track running from Eprom pin1 to pin2, remove track to open, normally closed.
- Files for tuners with 3.2 MHz Xtal and 50 Khz stepsize can be supplied on request.
Frequency table for the ZETF frequency control and all Eprom files, mentioned above:
| ZETF Switch position
| HRPT/PDUS Mode switch
| Tuner receives frequency
| Downconverter receives
| Used by Sat
|
| 1
| HRPT
| 141.0 MHz
| 1698.0 MHz
| NOAA 10,12,15
|
| 2
| CHRPT
| 143.5 MHz
| 1700.5 MHz
| Feng-Yung 1C 1)
|
| 3
| HRPT
| 145.5 MHz
| 1702.5 MHz
| Seatstar 2)
|
| 4
| HRPT
| 150.0 MHz
| 1707.0 MHz
| NOAA 9,11,14
|
| 5
| PDUS
| 134.0 MHz
| 1691.0 MHz
| MET5 (INDOEX) 3
|
| 6
| PDUS
| 137.5 MHz
| 1694.5 MHz
| MET7
|
Notes: All frequencies stated are when using a downconverter that converts 1694.5 MHz to 137.5 MHz !
- 1: Feng-Yung transmits "CHRPT", unencrypted, but modifications to receiver and decoder may be necessary.
- 2: Seastar (ORBCOMM) is encrypted.
- 3: For direct reception of MET-5 PDUS, you need a free view on the East horizon (from the Netherlands) !
Modification for the UV916S:
The UV916S uses a Motorola synthesiser-chip instead of the commonly uses TSA5510 to TSA5514 range. This synthesiser does not support in-lock-detection, i.e. You can set frequency, but cannot confirm if VCO is actually locked on this frequency. The ZETF frequency controller doesn't use this feature, the PC control Qbasic-program zetf916s.bas is specially modified for this tuner.
Modification for UV916S, UV1216, UV1316:
These tuners don't have a +12V terminal anymore, all electronics work on the +5V supply. Therefore they don't have a +12V connection. As a result of this the AGC voltage, from the GAIN-pot, must be lowered.
Connect the most right pin (see componentlayout, pin ?R?) from the GAIN-pot to +5V instead of +12V !
Schematic ZETF. (Design: H. v. Deursen)
NOTE: Initialisation at power-up (C3) could give problems:
- Slow edge at master reset (MR) could free oscillator, while part of ff's are still in reset-state and others not.
- Maybe some extra bytes in EPROM are needed to make sure that at start of the actual initialisation the tuner is in a known state. This seems to go wrong with my ZETF.
Work-around: Switch to another frequency and back, after power-up.
Schema decoder