Re: Problem with Log Power FFT block

options:
parameters:
author: ''
category: '[GRC Hier Blocks]'
cmake_opt: ''
comment: ''
copyright: ''
description: ''
gen_cmake: 'On'
gen_linking: dynamic
generate_options: qt_gui
hier_block_src_path: '.:'
id: test
max_nouts: '0'
output_language: python
placement: (0,0)
qt_qss_theme: ''
realtime_scheduling: ''
run: 'True'
run_command: '{python} -u {filename}'
run_options: prompt
sizing_mode: fixed
thread_safe_setters: ''
title: Not titled yet
window_size: ''
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [8, 8]
rotation: 0
state: enabled

blocks:
- name: samp_rate
id: variable
parameters:
comment: ''
value: '32768'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [212, 16]
rotation: 0
state: enabled
- name: analog_sig_source_x_0
id: analog_sig_source_x
parameters:
affinity: ''
alias: ''
amp: '1'
comment: ''
freq: '1000'
maxoutbuf: '0'
minoutbuf: '0'
offset: '0'
phase: '0'
samp_rate: samp_rate
type: complex
waveform: analog.GR_SQR_WAVE
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [62, 265]
rotation: 0
state: true
- name: blocks_complex_to_mag_squared_0
id: blocks_complex_to_mag_squared
parameters:
affinity: ''
alias: ''
comment: ''
maxoutbuf: '0'
minoutbuf: '0'
vlen: '1024'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [1052, 310]
rotation: 0
state: enabled
- name: blocks_nlog10_ff_0
id: blocks_nlog10_ff
parameters:
affinity: ''
alias: ''
comment: ''
k: '0'
maxoutbuf: '0'
minoutbuf: '0'
n: '1'
vlen: '1024'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [1203, 427]
rotation: 270
state: enabled
- name: blocks_stream_to_vector_1
id: blocks_stream_to_vector
parameters:
affinity: ''
alias: ''
comment: ''
maxoutbuf: '0'
minoutbuf: '0'
num_items: '2'
type: complex
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [579, 321]
rotation: 0
state: enabled
- name: blocks_throttle_0
id: blocks_throttle
parameters:
affinity: ''
alias: ''
comment: ''
ignoretag: 'True'
maxoutbuf: '0'
minoutbuf: '0'
samples_per_second: samp_rate
type: complex
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [337, 309]
rotation: 0
state: enabled
- name: blocks_vector_to_stream_0
id: blocks_vector_to_stream
parameters:
affinity: ''
alias: ''
comment: ''
maxoutbuf: '0'
minoutbuf: '0'
num_items: '2'
type: complex
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [600, 436]
rotation: 0
state: true
- name: fft_vxx_0
id: fft_vxx
parameters:
affinity: ''
alias: ''
comment: ''
fft_size: '1024'
forward: 'False'
maxoutbuf: '0'
minoutbuf: '0'
nthreads: '1'
shift: 'True'
type: complex
window: window.blackmanharris(1024)
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [786, 278]
rotation: 0
state: enabled
- name: qtgui_time_sink_x_0
id: qtgui_time_sink_x
parameters:
affinity: ''
alias: ''
alpha1: '1.0'
alpha10: '1.0'
alpha2: '1.0'
alpha3: '1.0'
alpha4: '1.0'
alpha5: '1.0'
alpha6: '1.0'
alpha7: '1.0'
alpha8: '1.0'
alpha9: '1.0'
autoscale: 'False'
axislabels: 'True'
color1: blue
color10: dark blue
color2: red
color3: green
color4: black
color5: cyan
color6: magenta
color7: yellow
color8: dark red
color9: dark green
comment: ''
ctrlpanel: 'False'
entags: 'True'
grid: 'False'
gui_hint: ''
label1: Signal 1
label10: Signal 10
label2: Signal 2
label3: Signal 3
label4: Signal 4
label5: Signal 5
label6: Signal 6
label7: Signal 7
label8: Signal 8
label9: Signal 9
legend: 'True'
marker1: '-1'
marker10: '-1'
marker2: '-1'
marker3: '-1'
marker4: '-1'
marker5: '-1'
marker6: '-1'
marker7: '-1'
marker8: '-1'
marker9: '-1'
name: '""'
nconnections: '1'
size: '1024'
srate: samp_rate
stemplot: 'False'
style1: '1'
style10: '1'
style2: '1'
style3: '1'
style4: '1'
style5: '1'
style6: '1'
style7: '1'
style8: '1'
style9: '1'
tr_chan: '0'
tr_delay: '0'
tr_level: '0.0'
tr_mode: qtgui.TRIG_MODE_FREE
tr_slope: qtgui.TRIG_SLOPE_POS
tr_tag: '""'
type: complex
update_time: '0.10'
width1: '1'
width10: '1'
width2: '1'
width3: '1'
width4: '1'
width5: '1'
width6: '1'
width7: '1'
width8: '1'
width9: '1'
ylabel: Amplitude
ymax: '1'
ymin: '-1'
yunit: '""'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [771, 536]
rotation: 0
state: true
- name: qtgui_vector_sink_f_0
id: qtgui_vector_sink_f
parameters:
affinity: ''
alias: ''
alpha1: '1.0'
alpha10: '1.0'
alpha2: '1.0'
alpha3: '1.0'
alpha4: '1.0'
alpha5: '1.0'
alpha6: '1.0'
alpha7: '1.0'
alpha8: '1.0'
alpha9: '1.0'
autoscale: 'False'
average: '1.0'
color1: '"blue"'
color10: '"dark blue"'
color2: '"red"'
color3: '"green"'
color4: '"black"'
color5: '"cyan"'
color6: '"magenta"'
color7: '"yellow"'
color8: '"dark red"'
color9: '"dark green"'
comment: ''
grid: 'False'
gui_hint: ''
label1: ''
label10: ''
label2: ''
label3: ''
label4: ''
label5: ''
label6: ''
label7: ''
label8: ''
label9: ''
maxoutbuf: '0'
minoutbuf: '0'
name: '""'
nconnections: '1'
ref_level: '0'
showports: 'False'
update_time: '0.10'
vlen: '1024'
width1: '1'
width10: '1'
width2: '1'
width3: '1'
width4: '1'
width5: '1'
width6: '1'
width7: '1'
width8: '1'
width9: '1'
x_axis_label: '"x-Axis"'
x_start: '0'
x_step: '1.0'
x_units: '""'
y_axis_label: '"y-Axis"'
y_units: '""'
ymax: '10'
ymin: '-140'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [1316, 512]
rotation: 0
state: enabled

connections:
- [analog_sig_source_x_0, '0', blocks_throttle_0, '0']
- [blocks_complex_to_mag_squared_0, '0', blocks_nlog10_ff_0, '0']
- [blocks_nlog10_ff_0, '0', qtgui_vector_sink_f_0, '0']
- [blocks_stream_to_vector_1, '0', blocks_vector_to_stream_0, '0']
- [blocks_stream_to_vector_1, '0', fft_vxx_0, '0']
- [blocks_throttle_0, '0', blocks_stream_to_vector_1, '0']
- [blocks_vector_to_stream_0, '0', qtgui_time_sink_x_0, '0']
- [fft_vxx_0, '0', blocks_complex_to_mag_squared_0, '0']

metadata:
file_format: 1
Hi Jeff - hmm, it appears the FFT block on 3.8.2 appears it doesn't like vectors?

-- Cinaed

On 1/16/21 1:24 PM, Jeff Long wrote:

On the 3.8.2 installation, could you try creating a new flowgraph from scratch that is just

  Signal Source -> Throttle -> FFT Log Power -> Null Sink

and see what happens?

Between 3.8.1 and 3.8.2, the line of code where you're seeing the error was removed. It was part of the yml file for that block.

On Sat, Jan 16, 2021 at 3:36 PM <wk@ire.pw.edu.pl> wrote:

> Try deleting the block, saving, and adding the block back in. I tried
>
>  source -> log power fft -> max ...
>
> with no problems.
>
Deleting and inserting again the block does not help. I can see the
problem even on flowchart created from scratch in GR 3.8
The problem exists on openSUSE Tumbleweed (GR 3.8.2), leap 15.2 (GR
3.8.1) and also in Windows port of 3.8.1 --
Wojciech Kazubski