mechanical polarizer question

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SatelliteGuys Pro
Original poster
Feb 14, 2004
Is a mechanical polarizer only used with an analog receiver.I have a
Manhattan Plaza ST 550 CIP-IR PVR Ready Receiver with 300 gig hardrive.It can controll polorizer and skew.I can loop out to the analog receiver since the manhattan can move an accuator.

Diseqc 1.0, 1.2, USALS & 36 volt Positioner & Skew control

Search up to 40 satellites in one unattended session !!!!!!!!!!!

The PLAZA model is an advanced digital satellite receiver with the unique option of Blind Search Facility and is designed to cope with the many different operating requirements of broadcast standards worldwide. During development, we have evolved with the best possible solutions to create the next generation of satellite receivers together with the most up-to-date electronics and easy to use on-screen menu system. The new digital satellite receiver is designed to give you outstanding pictures and CD-quality audio with a touch of a button.

· DVB Common Interface with dual CAM slots
· Embedded Irdeto access
· Optional Personal Video Recorder (PVR) ready (for fitting HDD 40GB to 120 GB)
· Unique Special Tuner (ST)
. Advanced blind search by frequency to capture unknown channels
. Fast channel change < 1 second
. Low power consumption
. High sensitivity tuner
. 2-45 Msps with freq range 950MHz to 2150Mhz
· DiSEqC USALS (Universal Satellite Locating System) function
· Fast auto programming and user friendly setup
· Channel sorting by alphabetical and FTA / Scrambled
· Fully automatic scan & store of TV & radio channels of
. Up to 40 selected satellites using DC or DiSEqC 1.2 Motor
. 4 satellites using DiSEqC switch
. 2 satellites using DiSEqC Mini A and Mini B tone burst signals (for Mono block LNB)
. Combination of satellites using DiSEqC Multi switch
· Up to 5000 channels TV or RADIO programmable
· Channel search option by all, FTA, network, TP with option of including data channels
· PLL RF modulator (CH 21---CH 69 PAL G, I, K, M)
· NTSC RF Modulator (CH 3 & CH 4 switchable)
· DC antenna positioner with Auto Satellite Calculator & Locator
. 200 satellite memory
. Dedicated 36V, 5Amp SMPS
· 100 – 240V AC 50/60 Hz SMPS main PSU.
· 100 – 240V AC 50/60 Hz SMPS positioner PSU
· Supports Universal, Single, Single S and Wide Band LNB applications
· Multiple controllable LNB switching eg 0/12V, 14/18 volts with skew (Mechanical Polarizer NTSC models), 22KHz & DiSEqC 1.2
· 1 LNB input (F-Type), IF signal loop through
· 2 SCART, TV (CVBS / RGB) with VCR/DVD loop through facility
· S-Video output on mini DIN
· RS – 232 port for PC connections and software upgrade
· 4 RCA sockets (Audio L & R, Video, 0/12V)
· Digital audio output (S/P DIF) on RCA
· LNB short circuit protection incorporated
· 4 Digit LED front panel display
· Supports multi TV standards
. PAL G, I, K, M & NTSC M
. Screen formats 4:3 and 16:9
· 256 colour GUI (Graphical User Interface) with picture-in-menu
· SCPC & MCPC receivable from C/Ku band satellites
· Fully MPEG-2 digital & DVB-S compliant
· On screen language support for up to 15 languages
· Built in Teletext function
· Support for Teletext Subtitles
· Support for DVB Subtitles
· Support for multiple language broadcasts
· SATCODX compatibility.
· EPG access for now, next and 7 days for on screen channel information
· 1 year, 10 event VCR
· Parental control facility by channel and menu locks
· Displays on screen message for antenna movement using DC or DiSEqC positioner
· 22 favourite groups (11 TV & 11 Radio) with facility to rename and categorise each group and unlimited storage capacity per group
· Last channel recall facility
· Last viewed channel remembered after power down
· Over The Air (OTA) software upgrade facility via Hotbird
· Displays Signal and Quality percentage Indication bars for ease of setup
· Time display on info banner during operation, and on front panel LED during standby mode
· Full editing functions (add, delete, name, move and sort) channel, TP and satellite
· Receiver to receiver user settings and channel data copying facility
· Multiple audio selection (L, R, Stereo & Mono)
· Programmable sleep timer up to 2 hours
· Includes 4 on screen games (Tetris, Black Jack, Minesweeper and Video Poker) and Calendar
· 3 language user instruction manual (English, French, German)
· Screensaver in Radio mode

Input Connector F-type IEC 169-24 Female
Frequency Range 950MHz to 2150MHz
Input Impedance 75 Ohm
Signal Level -25 to - 65 dBm
LNB Power & Polarization Vertical +14V, Horizontal +18V (600mA Max. with Overload Protection)
LNB Control 22KHz ± 4 KHz, Tone burst A/B and DiSEqC 1.2
22 KHz Tone Amplitude 0.6Vpp (±0.2V)
Input Symbol Rate 1~45 Msps
FEC Decoder Auto, 1/2, 2/3, 3/4, 5/6, 7/8
Transmission Standard DVB MPEG-2
Input Data Rate Max 15Mb/s
Aspect Ratio 4:3, 16:9
Video Resolution 720 x 480 NTSC, 720 x 576 PAL
Audio Decoding MPEG Layer 1 and 2
Audio Mode Single channel / Dual Channel/Joint Stereo / Mono
Sampling Rate 32KHz, 44.1KHz, 48KHz, 96KHz,
Slots 2 slots type 1 and type 2
PCMCIA DVB Common Interface Standard
Card Slot 1 Slot
PVR READY To fit 40 - 120 GB Hard Disk Drive
Audio Output 2 SCART sockets (TV/VCR), 2 x PHONO (L, R) / RCA
Digital Audio Output 1 PHONO RCA (S/P DIF)
Data Interface 1 RS232 (Bit Rate: 115,200 baud Connector: 9-pin D-sub type)
RF connectors 75 Ohm IEC 169-2 Male/Female
Frequency 470MHz to 860 MHz
Channel Range UHF CH21 to 69
TV standard PAL BG/ I /K PAL M, NTSC M
DC Motor Drive Output 36V DC --- , 5A max
Sensor Reed or Hall Effect switch
Connections Push Terminals
Input Voltage 100 -- 240 V AC, 50/60Hz ~
Power Consumption Max 30W
Protection Separate Internal Fuse
Input Voltage 100 -- 240 V AC, 50/60Hz ~ 17
The "mechanical polarizer" is found on most (if not all) analog receivers. Only Manhattan and Pansat DVB receivers have this ability (that I know of). And, only the Manhattan DVB receivers can control an actuator, along with most (if not all) analog receivers. There may be some others out there, that I'm not aware of, or have forgotten about. But, I think not?

A mechanical polarizer is not specific to an analog or a FTA receiver. It just depends on the type of LNB you're using. Whatever receiver you have must be able to control the polarity based on your LNB type. An LNBF uses control voltages (13 volts or 18 volts) to change polarities. An LNB uses the mechanical polarizer on the back of the feedhorn to change polarities. Have fun.
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