What to do if Apollo GPS signal levels drop when avionics are turned on?
If you observe that the GPS signal levels decrease when you turn on your avionics, it indicates noise interference from other avionics. To resolve this, turn off all avionics and then turn them on one at a time to identify the source of the interference. Ensure that the cable and antenna are routed away from potential sources of interference.
Why does my Apollo GX60/65 GPS not transmit?
Several factors can prevent the GX60/65 from transmitting. The TxKey input might not be pulled low, so check the TxKey (mic key) input to ensure it is pulled low for transmit. Also, the unit will not transmit on a weather channel, so select a different frequency. Verify the power input is connected to the comm 15-pin connector to ensure the comm has power. Finally, make sure the input supply voltage is greater than 9 volts DC.
How to fix low Apollo GX50 GPS signal levels?
Low GPS signal levels can be caused by several factors. Check the GPS antenna installation, connections, and cable routing, ensuring the GPS antenna is mounted on the top of the aircraft. Also, ensure the aircraft is clear of obstructions like hangers, buildings, and trees. RF interference at 1575.42 MHz from VHF comm can also be a factor; try moving the GPS antenna further from the comm antenna, adding a 1575.42 MHz notch filter in the comm coax, fixing or replacing the comm, or disconnecting the ELT antenna coax to check.
What to do if Apollo GX50/60/65 GPS does not compute a position?
If your GX50/60/65 GPS unit fails to compute a position, it may not be receiving signals, or the seed position, time, and date may be incorrect. Ensure that a correct position and time/date have been entered. Check the GPS antenna connections and confirm that the aircraft is clear of obstructions such as hangers, buildings, and trees.
Why Apollo GX50/60/65 GPS does not power on?
If your GX50/60/65 unit does not power on, it is likely not getting power. Check the power connections, breakers, and the main avionics switch.
What causes Apollo GX50 display to flash?
The display flashing on your Apollo GPS is normal operation and is caused by momentary power interruptions in the electrical system, typically when changing power sources. Operation recovers in approximately 1 second. If it becomes a persistent problem, have the electrical system checked.
How to fix Apollo GX50 GPS intercom that doesn’t function?
If the intercom on your Apollo GPS isn't functioning, ensure the intercom select input is pulled to ground to turn on the intercom function. Also, change the active frequency, as the active frequency has priority. If there is no voice activation, or you have to talk too loud, change the intercom squelch threshold using the setup function described in the user’s manual.
Instructions on how to obtain additional copies of the manual.
Describes the manual's purpose, target audience, and structure.
Details the capabilities and differences between GX50, GX60, and GX65 models.
Lists the key GPS navigation and VHF Comm features of the units.
Outlines different installation configurations and minimum requirements.
Details minimum connections for VFR GPS operation.
Details minimum connections for IFR GPS operation.
Required connections for the VHF Comm transceiver.
Information on updating the unit's navigation database.
Lists TSOs and FCC requirements the units meet.
Instructions for carefully unpacking and inspecting the unit.
Lists standard items included in the unit's package.
Lists external accessories needed for installation.
Identifies specific tools needed for connector crimping.
Details the aircraft radio station license requirement for the GX60/65.
Essential preparation steps and guidelines before installation.
General approach and planning for a successful installation.
Factors to consider for physical mounting in the aircraft panel.
Detailed steps for physically installing the unit in its mounting frame.
Covers wiring for rear panel connectors and antennas.
Details power input requirements and protection.
Describes connections for indicators, autopilot, and annunciators.
Explains connections for RS-232 serial ports.
Connecting audio outputs to speakers/headphones.
Connecting microphone inputs using shielded cable.
How to connect the transmit key input for the transmitter.
Optional connection for intercom function control.
Optional connection for remote flip/flop switch.
Requirements for the VHF comm antenna installation.
Critical factors for GPS antenna mounting and cable routing.
Steps to verify proper unit operation after installation.
Using the unit's test mode for diagnostics and configuration.
Verifying output connections using test mode.
Setting up the unit for specific operational modes (IFR, VFR, etc.).
Configuring RS-232 serial port input/output formats.
Adjusting Mic Gain and Receiver Squelch levels.
Procedures for verifying GPS position and signal reception.
Checking position accuracy and signal strength.
Procedures for checking receiver, transmitter, and antenna.
Adjusting the sidetone volume for microphone input.
Verifying database, direct-to waypoint, and navigation functions.
Covers voltage, current, power, and fuse requirements.
Provides dimensions and weight of the unit.
Lists operating conditions and environmental testing categories.
Outlines GPS sensor capabilities like channels and sensitivity.
Describes signals for CDI/HSI, autopilot, and annunciators.
Specifies input methods and requirements for altitude data.
Lists required annunciators for IFR operation.
Details performance metrics for the VHF receiver.
Details performance metrics for the VHF transmitter.
Details intercom microphone and headphone performance.
Lists and describes the various control inputs for the unit.
Specifies requirements for GPS and Comm antennas.
Details the pin assignments for the unit's rear connectors.
Notes on installation requirements and guidelines.
Requirements for operating the unit, including AFM supplement.
Procedure for seeking support from II Morrow.
Instructions for replacing the internal backup battery.
Notes on calibration and reference oscillator checks.
Guidelines for cleaning the unit's exterior.
Lists the specific environmental categories tested for.
Lists official accessories from II Morrow.
Details the standard GPS antenna accessory.
Details the optional GPS antenna accessory.
Information on Apollo ACU annunciators for IFR operation.
Specific details on the ACU control unit.
Lists compatible third-party accessories.
Combined units for annunciators, switches, and relays.
Information on relays for navigation source selection.
Compatible units for altitude data input.
Interface for fuel/air data computers.
Format and data content for moving map output.
Data format for nearest waypoint lists.
Data format for annunciator status outputs.
Data format for flight plan waypoint type transmission.
Format for transmitting comm data, e.g., frequency.
Format for receiving altitude data from encoders.
Format for receiving fuel/air data from computers.
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