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PLL_LD signal from DET_TMONI1 pin and/or DET_TMONI2 pin, set registers"h'14[D6:D4], [D2:D0]".
(1)
Local Oscillation Setting for RX
Set Local Oscillator frequency at "Lower Local".
"Receiving Local Frequency" = "RF Recieving Frequency"–"IF Frequency" = "VCO Frequency" / "Division
Ratio"
Example 1
RF Frequency: 314.94MHz, IF Frequency: 280kHz, Division Ratio: 6 (Select 315MHz band)
"Receiving Local Frequency" = 314.94MHz - 0.28MHz = 1887.96MHz / 6
Example 2
RF Frequency: 314.94MHz, IF Frequency: 230kHz, Division Ratio: 6 (Select 315MHz band)
"Receiving Local Frequency" = 314.94MHz - 0.23MHz = 1888.26MHz / 6
(2)
Local Oscillation Setting for TX
Set Local Oscillator frequency equal to RF transmitting frequency.
"Transmitting Local Frequency" = "RF Transmitting Frequency" = "VCO Frequency" / "Division Ratio"
Example
RF Frequency: 314.94MHz, Division Ratio: 6 (Select 315MHz band)
"Transmitting Local Frequency" = 314.94MHz =1889.64MHz / 6
6.5 RF Receiver
For RF-Receiving, set register:h'0A[D5] = "0".
6.5.1
RF-Receiving Abstract
Item
RF-Receiving Frequency Band
IF Frequency
Demodulation
IF Detection
Signal Detection
Additional Function
Bit Rate Filter Cutoff Frequency
Table 6-15 Receiving Function Abstracts
IF = 230kHz, setting of IF Filter Bandwidth: wide = 320kHz
IF = 280kHz, setting of IF Filter Bandwidth: middle = 270kHz
Single conversion system (Using Image Cancel Mixer)
FSK Demodulation
Delay Detection,
Pulse Count Detection
RSSI Detection, Noise Detection,
Preamble Detection
NIR (Near Interference Rejection) Filter
0.436kHz -19.78kHz (12 steps)
20
Function
315, 434, 868 / 915 MHz
FSK / ASK
ASK Demodulation
Envelope Detection
RSSI Detection, Preamble Detection
TC32306FTG
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2015-10-01
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