User's Manual

Table 48: Time and Frequency Inputs
Input Port Frequency Waveform Level Impedance Note
Ext Freq Ref 5 MHz Sine 2.6–5.3 Vpp 100k ohms AC coupled
Ext Freq Ref 5 MHz Square
45–55% duty cycle 100k ohms AC coupled
Ext Freq Ref 10 MHz Sine 2.6–5.3 Vpp 100k ohms AC coupled
Ext Freq Ref 10 MHz Square 45-55% duty cycle 100k ohms AC coupled
Ext Freq Ref 20 MHz Sine 2.6–5.3 Vpp 100k ohms AC coupled
Ext Freq Ref 20 MHz Square 45–55% duty cycle 100k ohms AC coupled
Ext Freq Ref 5 MHz/1PPS* Square 2.6–5.3 Vpp 100k ohms AC coupled; 25%
modulation 1pps
arrives on 75%
duty cycle
1 PPS 1 PPS Pulse 2.6–5.3 Vpp 100k ohms DC coupled
Front Panel
Ext Freq Ref
5 MHz Sine 2–5 Vpp; 10–18 dBm 50 ohms AC coupled
Front Panel
Ext Freq Ref
5 MHz Square 45–55% duty cycle 50 ohms AC coupled
Front Panel
Ext Freq Ref
10 MHz Sine 2–5 Vpp; 10–18 dBm 50 ohms AC coupled
Front Panel
Ext Freq Ref
10 MHz Square 45–55% duty cycle 50 ohms AC coupled
Front Panel
Ext Freq Ref
5 MHz/1PPS* Square 2.6–5.3 Vpp 50 ohms AC coupled; 25%
modulation 1pps
arrives on 75%
duty cycle
* 25% modulation, 1 PPS arrives on 75% duty cycle.
Note: The Front Panel EXT FREQ REF connection is the Frequency Calibrator (BNC connector) on the
transceiver module.
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Note: When two base radios at a site are configured to transmit at frequencies within the same
25 kHz band, the base radios must be connected to a common frequency reference to ensure
emissions are contained within regulated limits.
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| GTR 8000 Base Radio Optimization
Send Feedback | November 2013 | 6871024P71-A
Applicant: Motorola Solutions
Equipment Type: ABZ89FC5810B / 109AB-5810B
Exhibit D (Permissive Change)