Modes Of Operation; Changes To Modes Of Operation Section And Table 48 - Analog Devices ADRV9005 Reference Manual

Reference Manual
FREQUENCY HOPPING
Figure 104 shows a typical frequency hopping timing diagram with the HOP, Tx Setup, and Rx Setup signals. Besides these, it also shows the
hopping frequency selected through a hopping table defined by the BBIC and the timing when hopping frames are on air. The following sections
discusses them in more detail.
Hop Signal and Hop Frame
In FH, hop frame is the period during which a channel is enabled. The hop frame duration is defined by the time between the rising and falling
edge of the hop signal that the BBIC defines. During each hop frame, data can be operated on a new carrier frequency with either Rx or Tx.
Figure 105 shows that a hop frame consists of a transition and a dwell time period.
The transition period is, at a minimum, the time required to set up the Rx or Tx channel and switch to a new operating frequency. The dwell
period is the "on air" time, where a channel is on transmit or receive operation. The dwell period can be any length of time to operate on
a frequency. The start and end of the dwell time should align with the signal transmitted or received on air for a transmit or receive frame,
respectively. The hop signal is triggered by a DGPIO pin, which can be assigned by the BBIC from any of the available DGPIO pins. Each edge
of the hop signal marks both the possible start and end of a hop frame.
period and Tx/Rx frames are on air during the dwell time within each hop frame.
Channel Setup Signal
The channel enable pins (Tx/Rx_ENABLE pins used in non-FH operation) are repurposed in FH to signal if an upcoming hop frame is operating
on an Rx or Tx channel. These pins are redefined as "Tx/Rx Setup"; however, they are the same dedicated channel enable hardware pins that
are used to enable an Tx or Rx channel in non-FH mode.
hop signal edge indicates if the coming frame is a Tx or Rx frame. For example, the first "Rx_Setup" rising edge before the first hop signal edge
indicates that hop frame 0 is a Rx frame. The first "Tx_Setup" rising edge before the second hop signal edge indicates that hop frame 1 is a Tx
frame. With the Tx_Setup and Rx _Setup signals, as shown in

MODES OF OPERATION

The ADRV9001 provides four FH modes to achieve various framing requirements, as shown in
Table 48. Frequency Hopping Modes of Operation
Mode Transition Time
PLL Mux with hop table < channel setup + PLL
preprocess retune
analog.com
Figure 104. Typical Timing Diagram for Frequency Hopping
Figure 105. Hop Signal and Hop Frame
Figure 104
Figure 104 shows that a rising edge of the "Tx_Setup" or "Rx_Setup" signal before the
Figure 104, Rx and Tx frames alternate.
Total Frame Duration
(Transition + Dwell)
>= 13 µs
shows the transition time is represented by the gray time
Table 48.
Max PLL Retune PLL Cal
PLLs Time Allowed Mode
2 PLLs 2 transitions + 1 dwell Fast/Normal
ADRV9001
1
Channel
Single (1T/1R /1T1R)
Rev. A | 117 of 377