ADAR2001ACCZ-R7 datasheet(22/39 Pages) AD

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ADAR2001

Data Sheet

Rev. 0 | Page 22 of 39

MULTICHIP FREQUENCY AND CHANNEL SWEEP

Figure 34 shows an example of how the two state machines can

be used to perform a multichip frequency and channel sweep

from 10 GHz to 16 GHz (that is, sweep through all four

channels on a single chip while at a fixed frequency range,

move to the next chip to repeat the channel sweep, then move

to the next frequency to repeat the process). This example

assumes that the state machine control lines are connected in

parallel for up to 16 devices (64 channels, see Figure 33).

Initially, pulses on TxRST and MRST put both state machines

in State 0, which in this case, is a sleep mode.

Next, pulses on MADV and TxADV advance both state

machines to their first active state (transmitting on Channel 1

of ADAR2001 IC 1). Additional pulses on the TxADV line are

applied to successively switch through all the transmit channels

of the first ADAR2001.

After all four channels are swept on the first device, an

additional pulse on TxADV activates Channel 1 on ADAR2001

IC 2 while putting the Channel 4 PA on the first chip into a

ready mode to prevent disrupting the multiplier/filter signal

before the PA turns off. This sequence continues until all

64 channels on all 16 ADAR2001 ICs have transmitted at the

first frequency or range.

At that point, a pulse is applied to both MADV and TxADV to

advance the multiplier/filter sequencer to the next frequency

range of interest and set the Channel 1 PA on ADAR2001 IC 1

back into an active mode. Another series of TxADV pulses

follows until the last channel on ADAR2001 IC 16 is

transmitting the new frequency or range.

IC 16

10GHz TO 13GHz

IC 1

10GHz TO 13GHz

MULT_STATE_1

TX_STATE_3

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 3 ACT

MULT_STATE_1

TX_STATE_63

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 3 ACT

MULT_STATE_1

TX_STATE_4

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 4 ACT

MULT_STATE_1

TX_STATE_64

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 4 ACT

MULT_STATE_1

TX_STATE_2

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 2 ACT

MULT_STATE_1

TX_STATE_62

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 2 ACT

ADVANCE

MULT

ADV

ADVANCE

MULT_STATE_1

TX_STATE_61

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 1 ACT

MULT_STATE_1

TX_STATE_1

MULT:

BPF:

PA:

LOW ACT

LOW

CH. 1 ACT

IC 1

13GHz TO 16GHz

MULT_STATE_2

TX_STATE_1

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 1 ACT

MULT_STATE_2

TX_STATE_3

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 3 ACT

MULT_STATE_2

TX_STATE_4

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 4 ACT

MULT_STATE_2

TX_STATE_2

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 2 ACT

IC 16

13GHz TO 16GHz

MULT_STATE_2

TX_STATE_63

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 3 ACT

MULT_STATE_2

TX_STATE_64

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 4 ACT

MULT_STATE_2

TX_STATE_62

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 2 ACT

MULT_STATE_2

TX_STATE_61

MULT:

BPF:

PA:

LOW ACT

HIGH

CH. 1 ACT

......

MULTIPLIER

RESET

ANY

ADDITIONAL

MULTIPLIER

BANDS

MULT_STATE_0

TX_STATE_0

MULT: ALL SLEEP

BPF: N/A

PA: ALL SLEEP

SLEEP

RESET

MULTIPLIER

ADVANCE

MULT

ADVANCE

Figure 34. State Machine Loop Example for a 16-Chip Frequency and Channel Sweep

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