Sony SR-R1 Operation Manual page 50

Relation between the target frame frequency and time code
When the system frequency is 23.98 Hz, the time
code normally advances from 0 to 23 frames, and
this becomes the time code of the recorded
material (target frame frequency). If the rate at
which the time code advances is not constant
within the recorded material, a time code
discontinuity occurs at playback time. For this
reason, set the target frame frequency at recording
time to the same value as the time code at
playback time.
In SR Motion shooting, it is possible to set the
target frame frequency and the system frequency
at recording time to different values.
For example, if 60 frames are recorded with the
target frame frequency set to 23.98 Hz and the
system frequency set to 59.94 Hz, then 60 frames
per second of video are recorded, but the time
code does not advance from 0 to 59 frames and
S59P (23PsF)
Recorded at
60 fps
Play back at
23 PsF
50 SR Motion
instead advances from 0 to 23 frames to match the
target frame frequency. If 1 second is recorded
with these settings beginning from the 00 second
00 frame, the time code advances quickly from
the second 00 frames 00 to 23 and then continues
to advance as second 01 frames 00 to 23, and
finally as second 02 frames 00 to 11, at which
point a total of 60 frames have been recorded (see
the following figure).
If a file recorded in this way is played back when
the system frequency is set to 23.98 Hz (played at
a target frame frequency of 23.98PsF), the video
is played back in slow motion at 24/60 = 0.4 times
normal speed. However, the time code advances
by 1 second in the space of 1 second. Even if
sections have different numbers of frames, the
playback time code is continuous and no
discontinuity occurs.
1 second recorded
1 second played back
24 frames played back/60 frames recorded = 0.4 times normal speed
60 frames in
total
24 frames in total