Diseqc Test Tool Manual
DiSEqC Satellite Dish Motor With Metal Gear User Manual Specifications: Protocol: DiSEqC 1.2 & Goto X Compatible receiver: Receiver with DiSEqC 1.2.
AVR Projects • Content: • • • • DiSEqC-Tester - Testing Device for DiSEqC-Switches This is my first AVR-project on this page. The DiSEqC-Tester allows to test DiSEqC-switches that uses 1.0 or 1.1 protocols. (DiSEqC-Switches with 2.0 and 2.1 protocol have backwards compatibility with 1.0 & 1.1 respectively and also may be tested). The device every second sends a DiSEqC-message that makes switch a DiSEqC-switch. Four LEDs are intended to show on/off state of ports of a DiSEqC-switch. • Features: • Power supply is 12VDC, max 200mA • Ports quantity to monitor - 4 (using internal LEDs) • Protocol support DiSEqC 1.0, DiSEqC 1.1 (Write Port Group Commands) • Two levels of 22kHz-tone - 650mV, 300mV • Switch frequency - 1Hz or 2Hz (depends on firmware version) • Commands indication via LED blinking and sound • Short circuit protection with sound indication Schematic view of the device: To test a DiSEqC-switch you must connect the red wire with 'Receiver' input of the switch, blue wire with case, connect remaining yellow wires to ports of the switch in any order.
Choose the protocol, tone-level and then turn power on. If the DiSEqC-switch is OK, a blue LED of the tester will be switching every second to another blue LED with short red LED blinking and beeping.
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Next photo and video shows how it looks. Connection of the DiSEqC-Tester: The DiSEqC-Tester with a DiSEqC-switch 1.0 (video): The heart of DiSEqC-Tester is AVR microcontroller ATtiny13-20PI, with clocking from internal RC-generator at 4.8 MHz. Schematic Diagram of the device: Testing in Proteus with DiSEqC-Switch 1.1 Model: The device every second generates a DiSEqC-message which has duration of 54ms. Each message consist from 4 bytes. Byte is 8 bit + 9-th odd bit. If protocol 1.0 is used, then device sends next commands-sequences: $E01038C0, $E01038C4, $E01038C8, $E01038CC, $E01038C0 and so later, else $E01039F0, $E01039F1, $E01039F2, $E01039F3, $E01039F0. These commands are so called 'Write Port Group N0' (38h) and 'Write Port Group N1' (39h) by DiSEqC-Protocol.
The full description of DiSEqC-Protocol can be found at web site. For example, DiSEqC-Message $E01038C0 switches port 'LNB1' of DiSEqC-Switch 1.0/2.0 into active state. A DiSEqC-message example on PB0-pin: The DiSEqC-Tester board in P-CAD: The DiSEqC-Tester board view: (protocols 1.0, 1.1; Frequency 1Hz, no pause after power on). (protocols 1.0, 1.1; Frequency 2Hz, pause 0.5s after power on).
In P-CAD 2004 format DiSEqC-Tester+ (used ATtiny2313) New version of the DiSEqC-Tester using ATtiny2313: Schematic diagram: - DiSEqC 1.0 (4 ports), 1.1 (8 porst), 1.2 ('west', 'east'). After every 4-th/8-th command - large pause (for protocols 1.0 and 1.1). No large pauses in 1.2-protocol mode. The archive contains some diagrams. Number of port-LEDs may be variable, for example 8 or 10, and depends on type of your DiSEqC-Switch. DiSEqC-Tester+ in Proteus (Designators may mismatch): DiSEqC-Tester v2 - DiSEqC-Tester with 22kHz tone support In fact, this device is a DiSEqC-generator, that generates standard DiSEqC-messages. This version of tester is able to provide the 22kHz between the messages, if enabled by DIP-Switch.
The DIP-Switch is intended to select protocol and mode you need. Also the DiSEqC-Tester v2 has an improved short circuit protection. Additionally, the 22kHz tone support allows you to test an 22kHz-switch.
The DIP-switch allows to select DiSEqC level, type of framing byte and few other capabilities (see schematic diagram). The button is used only in manual mode, when the tester sends a message after button pressing.