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Its Mostly About The Receiver
Dynamic Range
–
Its About Optimal Gain Control
11
•
Goal is to add enough gain to amplify the desired signal for
maximum converter resolution
•
Hard when, signals are very weak and close to the noise floor
•
Receiver controls to use:
•
Preamplifier/Attenuator
– base setting to get in the “ball park”
•
AGC Time Constant
–
set to match characteristics of the desired signal
•
RF Gain Control
–
manual adjustment to fine-tune AGC operation
•
IP+ and similar controls
– proprietary ”magic” to optimize AGC Loop to
reject de-sensitation effects due to adjacent signal interference
A/D
Digital
Proc.
(FPGA)
RF (Pre)
Amplifier
Bandpass
Filter
D/A
Digital
Osc.
AGC Loop, IP+
A/D
R
ang
e
00..0
11..1
+
Summary of Contents for IC-7300
Page 1: ...GETTING THE MOST FROM YOUR HF TRANSCEIVER FRED KEMMERER AB1OC JANUARY 10TH 2017...
Page 17: ...TRANSMITTER TIPS AND TRICKS 17...
Page 24: ...COMMON OPERATING SCENARIOS 24...
Page 29: ...Getting To Know You 29 Reading The Manual Reading The Fine Manual For Your Rig...
Page 38: ...D Michaels N1RF Jan 10 2017 Transmitter Monitoring 9 Design for Current Transformer RF Sampler...